For stock, non-performance automotive street applications, API SN licensed oils are OK. For better wear protection, Royal Purple HPS and XPR lines of engine oils are formulated with a higher concentration of the zinc and phosphorus anti-wear additive and are suitable for ALL flat tappet and roller tappet camshaft valve trains. A properly formulated High Mileage oil like HMX will help reduce oil consumption and restore lost power. And it seems to some that the only reason it costs so much is the packaging and its purple dye. Engineered for maximum engine protection and filter life, it provides superior particle removal with 99% filtration efficiency. And you know that purple was rare back then as it was too expensive to produce. Around 25K retailers are now marketing the oil from Royal Purple. Had a 351 ford marine engine for 18 years used RP for almost all that time the engine ran perfect until I gave the boat to a young mechanic engine hours were approx 4000 hrs. WebAnswer: I use royal purple synthetic gear oil in my HD Electraglide motorcycle transmission. According to the company, their oil can last up to 4 times longer than conventional oils. It prevents corrosion, improves engine horsepower and torque, and increases fuel economy. Ans: If your car has 75,000 miles or more, you should choose a premium full synthetic motor oil specially formulated for older vehicles. It is available in single quart and five-quart containers. Royal Purple got its name from a customer who remarked that he had never seen purple oil. Royal Purple its a unique name in the synthetic oil industry. Some think that it is not very impressive at best. Here are other related articles you might like: Do You Know Who Makes Kendall Oil? For guidelines specific to your vehicle, we recommend contacting our technical department at. However, if youre on a budget or dont need all the bells and whistles, then Mobil 1 may be just fine. Do you intend to keep it for a long time? They are always very responsive to answer any questions or concerns of the customers. For low temperature, oil-injected applications, Royal Purple Snow 2-C is recommended. I have always thought Royal Purple is good stuff. Then, he found that no suitable lubricant could manage the extreme demands of the gear. With Royal Purple full synthetic motor oil, feel free to change your oil every 12,000 miles, or 12 months (whichever comes first). Your email address will not be published. How Long Does Royal Purple oil stay purple? WebVehicles no longer under warranty using Royal Purple Duralec Super, Duralec Ultra, or HPS engine oils, that hold 10-quarts of oil or more, can extend oil change intervals up to 15,000 miles (24,140 km) or one year, whichever occurs first in One of the biggest benefits of premium synthetic oil is its ability to withstand high temperatures without breaking down. It appears to have very similar properties to the former, minus the purple dye and a much lower price. Yes. Amsoil Vs Royal Purple - Which Is the Better Oil? Royal Purple motor oil may be expensive. While normal lubricants have maximum efficiency for 3000 to 5000 miles, royal purple oil, being a synthetic engine oil, can last for up to 12000 miles or a year Oil Change 101 - Royal Purple Direct? So it doesnt seem like much of a difference. No, a higher concentration of Purple Ice than recommended will not harm the cooling system or engine. Royal Purple Max-Tane effectively replaces up to 4 other diesel fuel additive products. Find a With Royal Purple full synthetic motor oil, feel free to change your oil every 12,000 miles, or 12 months (whichever comes first). Thats 1650 fewer oil changes over the life of a car or truck that reaches 200,000 miles. It is the only additive formulated specifically for direct injection gasoline (DIG) engines, and is the most concentrated PEA fuel injector cleaner available on the market today. The Truth About Royal Purple Engine Oil for Your Car, DIY and car repair with Scotty Kilmer. Address:454 Patterson Street, Houston, TX 77074. WebUse Royal Purple's Lubricant Advisor to easily find the right products for your vehicle. Still, it has the most positive reviews among all the other synthetic engine oils. But if you want to know more about the basics of oil change and why you should choose synthetic oil for your engine, read the article thoroughly. Then, he named the company Royal Purple as the oil was purple. Under normal driving conditions, Royal Purple motor oil can extend oil change intervals up to 12,000 miles. There wont be any build-up in your engine. [Detailed]. Just be sure to check your owners manual to see if its recommended for your car before making the switch. Additionally, the purple color is added to help indicate to users that this oil has been fortified with these extra lubricants. For the best protection, Royal Purple has formulated its XPRspecifically with this in mind. Royal Purple currently offers many viscosity grades of API-licensed motor oils1. Excessive fuel dilution may effect the performance of any engine oil; however, XPR and Nitro Plus oil offer greater protection than other oils even with excessive fuel contamination. The journey started with synthetic oil and its unique additives. Royal Purple 10W30 also has superior high temperature stability and resistance to thermal breakdown.This oil is the perfect choice for those who want the best possible protection and performance for their engine. Also, the purple dye may seem frivolous. [Detailed]. Some chemical compounds traditionally used in fuel and lubricant additives may contribute directly to LSPI or to the formation of deposits that can cause LSPI. WebWith Royal Purple full synthetic motor oil, feel free to change your oil every 12,000 miles, or 12 months (whichever comes first). So, they paid $335M to buy and get the ownership in 2012. Head-to-Head Comparison Between Valvoline Vs Mobil 1. Because of this, they are susceptible to a form of pre-ignition called Low-Speed Pre-Ignition (LSPI). In fact, some of todays vehicles have recommended service intervals from the manufacturer ranging anywhere from 5,000 to 7,500 miles. No. WebHow long does Royal Purple engine oil last? For a specific recommendation, contact our tech department at 888-382-6300. With Royal Purple full synthetic motor oil, feel free to change your oil every 12,000 miles, or 12 months (whichever comes first). This should be more than sufficient since ambient temperature doesnt get that cold. This means with royal purple oil, you dont have So, he developed a new lubrication additive technology. For guidelines specific to your vehicle, we recommend contacting our technical department at rpautotech@www.royalpurple.com. Royal Purple Max-Tane is formulated for use in any diesel-type vehicular fuel including #1 and #2 diesel, biodiesel, and ultra-low sulfur diesel fuels. Royal Purple Motor Oils are composed of a proprietary formulation of synthetic base oils and synthetic additives containing iso-paraffinic diluents.Royal Purple Break-in oil is the only non-synthetic automotive engine oil offered by Royal Purple. If you want to save money, go with Amsoil. (not sure if I believe that part). You can find this oil in a 1quart or 32floz bottle. Heres a look at the current price of Royal Purple motor oil: Do you drive an expensive vehicle that typically comes with high repair costs? All the oils can increase power and torque. Meanwhile, the deal was worth $1M+ per year. We shall review the Royal Purple 5W-30 synthetic motor oil for this article. Yes, Royal Purple oil is good for high mileage vehicles. But is it really worth the price?In this Royal Purple oil review, well take a look at what this motor oil has to offer and see if its worth the investment. TGDI engines offer very high power density (power per displacement) and operate most efficiently at low engine speeds. WebWhile normal lubricants have maximum efficiency for 3000 to 5000 miles, royal purple oil, being a synthetic engine oil, can last for up to 12000 miles or a year or whichever comes first. On the other hand with conventional oil, you may have to perform an oil change 2-3 times a year. All viscosity grades of Max Gear are formulated with limited-slip friction modifier necessary for some limited-slip differentials. In such cases, a lightweight oil might not be recommended. (not sure if I believe that part). To ensure best mixing with fuel, it is best to add Max-Tane to your fuel tank at fill-up, prior to putting the fuel into the tank. Using uniform molecular technology, royal purple was able to create the purest synthetic lubricant there is. Combined, these ingredients create an oil thats designed to provide maximum protection and performance for your engine. It is made in the USA and is popular among performance enthusiasts because it is said to offer superior protection and performance over traditional oils. What you can do, is take measures to keep the engine as efficient as possible. Lastly, I want to add that Royal Purple has a fantastic track record for innovation. They took ownership of a 125000 square feet production area. Many feel that its high price is unwarranted. Just like you need to clean the exterior of your car, the engine requires a cleaning too. For best results, use at every fill-up. 6 Truth About Royal Purple Engine Oil (Video Review), Heavy Duty Lockers for Your Truck Reviews, Heavy Duty Top Rated Recovery Winch Review, Heavy Duty Headers for 5.3 Silverado Reviews. Calumet Specialty Products Partners (CLMT) showed interest in buying the highly productive Royal Purple. It also offers protection from wear, deposit, and sludge. You wanted to know about how many miles can you go on Royal Purple oil. All Royal Purple premium oil filters are compatible with both types of motor oils. This will enable Royal Purples high solvency to remove existing deposits gradually; if excessive, such deposits can restrict oil flow, as well as reduce the oil service life significantly. 1 quart (946 mL) $9.995 quarts (4.73 L) $44.99. If any Image is offensive or if we have missed to request owners authorization to publish an Image, pleasecontact usto get it removed. The change interval of Royal Purple 5W-30 engine oil is 12 months or 12,000 miles, whichever comes first. I'm the guy responsible for ensuring that every blog post we publish is helpful for our reader. True Story no embellishments. There are many reasons why Royal Purple oil is so special. The most common reason is that synthetic oil makes your car sustain one oil change for almost a year if youre a daily user. No, not at all. The naming of the company has another story, as many historians say. Also, it prevents sludge and deposits. That's 1650 fewer oil changes over the life of a car or truck that reaches 200,000 miles. He started the journey of building an oil manufacturing company named Royal Purple in 1986. The oil will appear brown at some point. DexCool; Ford and Chrysler orange, gold, pink; European and Japanese OEM red, pink, etc.). Is Royal Purple good for high-mileage vehicles? Royal Purple is the maker of Royal Purple motor oil. If yes, then moving to Royal Purple probably makes sense. If youre concerned about your engine, you must be a Royal Purple oil user. WebVehicles no longer under warranty using Royal Purple Duralec Super, Duralec Ultra, or HPS engine oils, that hold 10-quarts of oil or more, can extend oil change intervals up to 15,000 miles (24,140 km) or one year, whichever occurs first in Pre-ignition and detonation, commonly referred to as knock, are abnormal combustion events that can occur in gasoline engine combustion chambers. This includes traditional green ethylene glycols, as well as OAT/HOAT antifreezes (e.g. Royal Purple motor oil breathes new life into older engines. A premium engine oil brand, Royal Purple 5W-30, comes at a high price. With Royal Purple full synthetic motor oil, feel free to change your oil every 12,000 miles, or 12 months (whichever comes first). Tests have yet to find an additive to enhance Royal Purple motor oils performance characteristics. Everybody wants their vehicle to run fast, give extra mileage, and perform well in any condition. Ans: Royal Purple full synthetic oil will last until 12 months or 12,000 miles. In particular, it is suitable for older high-performance engines equipped with flat tappet camshaft systems. WebRoyal Purple is a synthetic oil that has been around for over 25 years. CLMT controls everything in oil plants in Indianapolis, Indiana, United States. The down-speeding of the powertrain involves the use of transmissions with an increased number of gear ratios with smaller steps between each ratio. Due to the Royal Purple 5W-30s low coefficient of friction, your car can have greater fuel efficiency. Follow the manufacturers recommendations regarding viscosity. It includes patented additives that extend the life of your engine. HMX is chemically enhanced to revitalize hardened seals reducing oil consumption common in higher mileage engines. All Royal Purple engine oils contain the zinc/phosphorus compound zinc dialkyl dithiophosphate (ZDDP), but the maximum amounts are restricted by the current API oil specifications. But it also comes with a long change interval of about 12 months. Royal Purple Max-Cycle engine oils are rated JASO MA2 in the JASO T903:2011 Clutch Friction Test. You can also use it on commercial fleets and stationary industrial engines. WebHow long does Royal Purple gear oil last? The manufacturer of your car puts forth these requirements, including oil weight. Royal Purple Synthetic Oil offers higher fuel economy and great startup protection. An oil company was facing chronic bearing failures in its massive compressors in 1986. Royal Purple currently offers many viscosity grades of API-licensed, warranty compliant motor oils. Royal Purple Max ATF is a synthetic high-performance automatic transmission fluid. Starting in 1986 in Porter, Texas, the company is now selling products on marketplaces like Amazon, eBay, Walmart, and others. Royal Purple 5W-30 is compatible with many vehicles, such as: BMW 3 Series Ford-150 Ford Expedition Hyundai Sonata Hyundai Tucson Kia Sportage Nissan Frontier Do we even know the frequency of changing the engine oil? Conventional oils cost less and synthetic oil costs more. WebWhile normal lubricants have maximum efficiency for 3000 to 5000 miles, royal purple oil, being a synthetic engine oil, can last for up to 12000 miles or a year or whichever comes first. It is recommended for use on both diesel and gasoline automotive engines. Royal Purple Synthetic Oil provides great startup protection and higher fuel economy than other products. These are the main reasons why an oil change is so important for every car. One might say that royal purple oil is an expensive one as it is synthetic engine oil. Yes. Allow a minimum of 6,000 miles (9656 km) before using Royal Purple in diesel engines. Royal Purple motor oil increases horsepower and torque by reducing friction and improving combustion efficiency. Upgrading to Royal Purple motor oil and their premium long-life filter can extend time between oil changes to once every 12, 000. Yes. When I changed to RP [1] max RPM increased [2] engine ran cooler. I have always thought Royal Purple is good stuff. Thats changing the oil. No, but it will prevent it from degrading any further, and allow it to be safely used without forming engine deposits. So, which one should you choose? Thats why its high cost is somewhat justified by its long-term benefits. Thats how it maintains the performance of the car in different weather conditions. Max-Boost is safe for use in any gasoline and gasoline/ethanol blend of fuel, but many non-performance cars do not benefit from high octane fuel. Conditioning for hard seals prevents leaks, and it is suitable in both high summer and sub-zero temperatures. Currently, the brand is formulating oils for the racers, as Royal Purple oil can dramatically reduce wear. They praise how it flows smoothly in the engine, plus the added horsepower and improved mileage. The Truth About Royal Purple Engine Oil for Your Car >> Check out the video below: The Truth About Royal Purple Engine Oil for Your Car Watch on Conclusion As I have already cited itll last for about 12,000 miles or a year or whatever comes first. That's 1650 fewer oil changes over the life of a car or truck that reaches 200,000 miles. It can hold up even better than other alcohol and methanol racing oil applications. By using a smaller displacement engine that is kept in a low speed and efficient operating range, fuel economy is optimized. Some of us have driven. This further reduces the chance that the filter media could collapse. On the other hand, synthetic oils have very few impurities that dont even count. Also, it offers protection from wear, deposit, and sludge. Want more articles like this? Royal Purples lubricants can be used with exotic fuels. It is formulated to help improve your car engines overall performance. We strongly recommend against using any oil additives as do most automotive manufacturers. Aug 19, 2012. Can You Drive a Long Distance With a Plugged Tire? Check if your engine starts leaking after using Royal Purple or any other synthetic oil. Yes, it can be used in any gasoline and ethanol blend (E5, E10, E15, E85, etc. Royal purple motor oil contains the advanced, patented Synerlec additive technology. For smaller capacity engines, oil change intervals should be every 12,000 miles (19,312 km) or one year. HP 2-C may be used in pre-mix applications. It also offers protection from wear, deposit, and sludge. It forms non-combustible gums that form deposits in fuel systems / combustion chambers, which decreases engine performance / fuel economy and increases emissions. B100 = 25 (at 25 or greater micron, media is 99% efficient.) Synerlec additive technology makes Royal Purple uniqueand its a big reason why Royal Purple products perform like no other lubricants on the market. Car Leaking Antifreeze When Parked Causes and How to Fix. Premium synthetic oil is a type of motor oil that is designed to provide better protection and performance than conventional motor oils.It is made from man-made chemicals rather than crude oil, which means that it can be tailored to meet the specific needs of your engine. For guidelines specific to your vehicle, we recommend contacting our technical department 888-382-6300. Williams grabbed the chance to show his expertise based on his lubrication background. Synthetic media is used to build the filter part. Features of Royal Purple Oil Filters Materials Used Royal Purple filters are made with quality materials. Royal Purple 5W30 is also compatible with most synthetic and conventional oils, making it a great choice for those who want the best of both worlds. Royal Purple achieved a United States trademark in 2004 for their specific uses of purple containers to market the lubricants. Lets talk about customer reviews according to the following factors: One cannot deny Royal Purples effectiveness in improving engine performance. So, it keeps the engine functional and protects it from impurities. HPS is formulated with consumers in mind. Will a Trailblazer Transmission Fit a Silverado, Can a Repo Man Trespass on Private Property. You can use Royal Purple oils with exotic fuels such as alcohol, methanol, nitrous oxide, etc. Is Royal Purple Good synthetic Oil Brand YES! Yes. Here is a short comparison: Royal Purple is a fully synthetic motor designed for superior defense and performance of a motor engine. A high-quality synthetic motor oil, Royal Purple helps improve engine performance and efficiency. For example, late model TGDI 2.0 Liter engines commonly produce power levels equaling 3.0L to 3.5L V-6 engines from 5 to 10 years ago. You should give this oil a try! When using Purple Ice in a cooling system running straight water, Purple Ice should be added once a year or every 15,000 miles (24,140 km), whichever comes first. Other fluids they produce include: The business was founded in 1986 by synthetic oil developer John Williams. In the continuing effort to increase passenger car and light truck fuel economy, automakers have employed a down-sizing and downspeeding strategy to current vehicle powertrains. Is Royal Purple good for high-mileage vehicles? When using Purple Ice with a 50/50 antifreeze/water mix, we recommend adding 1 ounce of Purple Ice per quart of cooling system capacity. All rights reserved 2023 Copyright RoadSumo.com. For fuels containing 10% or great ethanol content, Max-Clean will stabilize for up to 1 year. The XPR oils are formulated to combat fuel emulsification to hold up even better than Royal Purples other engine oils in alcohol and methanol applications. Aug 19, 2012. With Royal Purple full synthetic motor oil, feel free to change your oil every 12,000 miles, or 12 months (whichever comes first). WebRoyal Purple is a synthetic oil that has been around for over 25 years. Now, many users can explain why they prefer Royal Purple over other famous brands in the market. How long the engine would stay safe depends on the efficiency of the filter. It is primarily known for its line of synthetic motor oil used in diesel and gasoline engines. Does Royal Purple work? With Royal Purple full synthetic motor oil, feel free to change your oil every 12,000 miles, or 12 months (whichever comes first). Royal Purple suggests adhering to manufacturers recommendedoil change intervals for vehicles under warranty. This company also manufactures lubricants for cars and boats. The oils are high quality and provide good protection for engines. Yes, HMX is fortified with Royal Purples proprietary Synerlec additive technology as well as additional seal conditioners beneficial to higher mileage engines to maintain elasticity of gaskets and seals. Please note that such stop-leak products often typically put a coating on the interior surfaces of the cooling system, so the effects of Purple Ice may be diminished. Beyond that, you can use it even when the vehicle reaches high-mileage status, such as more than 75,000 miles. If youre looking for an oil that will help your cars engine run smoother and last longer, Royal Purple is a great option. With Royal Purple HMX and HPS series oils, drain intervals may be extended to 15,000 miles (20,000 km) or one year, whichever occurs first in street-driven, mechanically-sound vehicles. On Which Vehicles Can Royal Purple 5W-30 Be Used On? For 2-cycle motorcycles with a separate transmission fluid reservoir, we recommend Royal Purple Synchromax or an engine oil from our Max-Cycle or HPS series. No. It contains polyetheramine (PEA), a proprietary detergent that solubilizes deposits so they can be burned during the combustion cycle in an engine. By optimizing torque to lower operating speeds, greater fuel economy is possible. Also, they are reasonably priced and have a good selection of oils for different applications. That said I use the dealer synthetic which is Pennzoil. Royal Purple can improve fuel economy by 4.5%, according to commissioned test data. -99% at 25 micron and larger WebAccording to the manufacturer, Royal Purple oil can last up to five years or 150,000 miles. The pour point of all Royal Purple SAE grade oils is less than -30F. So, the investment is worthy. To allow for proper break-in of the engine, Royal Purple recommends waiting until the manufacturers first scheduled oil change or a minimum of 2,000 miles (3218 km) in new gasoline engines. There are a lot of oils on the market these days, and it can be hard to know which one is best for your car. Ans: If your car has 75,000 miles or more, you should choose a premium full synthetic motor oil specially formulated for older vehicles. Because that is one of the, You should know why everyone is opting out for it and what are the. Thats why you need to do something for your vehicle. WebVehicles no longer under warranty using Royal Purple Duralec Super, Duralec Ultra, or HPS engine oils, that hold 10-quarts of oil or more, can extend oil change intervals up to 15,000 miles (24,140 km) or one year, whichever occurs first in The Truth About Royal Purple Engine Oil for Your Car >> Check out the video below: So, what do you think is Royal Purple good oil brand? In 2-cycle engines, to ensure best mixing with the 2-cycle fuel/oil mixture, we recommend adding Max-Clean to the gas tank prior to putting the 2-cycle fuel/oil mixture into it. In different plants in the US, the company produces the oil for racers, general, and industrial consumers. I have always thought Royal Purple is good stuff. Royal Purple motor oil works just as effectively as any other lubricant. (not sure if I believe that part). Within this time, they have gained many positive feedbacks for their products delivering good results. WebWith Royal Purple full synthetic motor oil, feel free to change your oil every 12,000 miles, or 12 months (whichever comes first). Another option is to shop online. While normal lubricants have maximum efficiency for 3000 to 5000 miles, royal purple oil, being a synthetic engine oil, can last for up to 12000 miles or a year Oil Change 101 - Royal Purple Direct? It has been manufacturing synthetic oil with its additives. Royal Purple is fully compatible with both conventional and synthetic oils. Your email address will not be published. Royal Purple is the only motor oil company that is ISO 9001 and API certified. This way, marginal seals may be exposed after those pre-existing deposits have been removed. Antifreeze Vs Coolant What Is the Difference Between Them? For all Harley Davidson and other air-cooled V-twin motorcycles, we recommend Royal Purple Max-Cycle 20W-50. (Answer Explained), Is Pennzoil Platinum Good Oil? Absolutely. How long does Royal Purple oil last? Crayola announced in March of 2020 that it was retiring the color, along with three other shades, as part of its Color Renovation project. Also, a high-performance additive technology works behind the manufacturing. This formula was specifically designed to protect the catalytic emission system found in almost all modern cars. Ans: Royal Purple full synthetic oil will last until 12 months or 12,000 miles. WebAccording to the manufacturer, Royal Purple oil can last up to five years or 150,000 miles. Royal Purple Max-Tane is available in a 20 ounce can. In most cases, vehicles with properly functioning cooling systems can reduce oil temperatures by 5-20F by using Royal Purple. Theyre always at the forefront of the latest automotive technology. The objective of synthetic lubricants is to carry deposits away. Now, the quality of oil can save more fuel and reduce emissions. And because it doesnt break down as easily, theres less chance of sludge build-up in your engine over time.So if youre looking for an oil that will provide better protection and performance for your vehicle, premium synthetic oil is a good choice. Synthetic media is used to build the filter part. Max-Clean is suitable for use in all liquid automotive-type fuels, including gasoline, ethanol, diesel, and bio-diesel. Royal Purple Max-Tane is better than any other consumer diesel additive because it does the job of every other consumer diesel fuel additive. There are, however, many other consumers who dont mind that Royal Purple costs so much. Is Royal Purple good oil brand? Royal Purples manufacturer recommends using the lubricant after the first oil change schedule. The main ingredient in Royal Purple motor oil is polyalphaolefin (PAO). Their oils are full synthetic which means the engine remains protected from wear and tear. Of course, these are just estimates and your results may vary depending on how often you drive and maintain your vehicle. The dye thats used to color the oil dissipates shortly after being put into service. You have to change the filter regularly, maybe after every 10,000 miles, as particles clog it. It is made in the USA and is popular among performance enthusiasts because it is said to offer superior protection and performance over traditional oils. As a result, your car will have 3-5% more power and torque than when you use other brands. With extended use, Royal Purple synthetic lubricants with Synerlec improve the surface condition of metallic surfaces by smoothing inherent surface roughness, actually reducing friction and improving lubrication of internal moving parts. Preignition and detonation result in a huge spike in combustion pressure and temperature that often results in damage to the engine. Of course, these are just estimates and your results may vary depending on how often you drive and maintain your vehicle.If you do decide to use Royal Purple oil in your car, be sure to follow the recommended maintenance schedule for best results. Dont worry too much, just go for it. Lots of people swear by it, and say it gives them power. HMX is also formulated with a slightly higher amount of anti-wear additive to provide more wear protection for older engines. They wanted to sponsor the Las Vegas Bowl for three years (2013-2016). Again, what are the benefits of Royal Purple oil? But if the expense is not an issue for you, Royal Purple is a decent enough oil to put into your engine. Among most of the synthetic oils, royal purple oil is pretty expensive. Many synthetic motor oils are designed to last up to 15,000 miles or one year, whichever comes first.However, it is always best to consult your owners manual or a professional mechanic to get an accurate estimate for how long your particular oil will last. But it appears to be part of the appeal. Isolated instances have been reported of increasing oil temperatures. Over the last several years, these specifications have become increasingly restrictive on certain additives, particularly those commonly used for anti-wear. That said I use the dealer synthetic which is Pennzoil. As long as the oils have the same weight, they will mix well.

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