Have trusted Amsoil for nearly two decades and have never been disappointed. The product performance and consistent quality speak for itself. The customer support is outstanding as they recognize the importance of remedying issues to the customer satisfaction in a timely and professional fashion.

Great oil that seems to keep engine cleaner longer, otherwise works well.

I've been using Amsoil XL for over 10 yrs now. I took oil samples from Mobil 1 before switching, and oil samples after. Amazing how little wear. Just sold my 2011 Tahoe with 185,000 mi. Compression test was excellent.

I have been using this oil in my 2017 Ecoboost F-150 since new. as many people know they have cam phaser issues due to lack of oil pressure. well, my truck now has 105,000 miles and I have not had a single issue. Amsoil has superior products that prevent any issues.

Quality oil always above and beyond expectations

I was asked to write a review on this product. This is the first oil change on my recently purchased 2019 MazdaI CX9! I have been using Amsoil products for years, their products are the best. I am sure I will be 100% satisfied.

This has been a very good oil for my 2015 Subaru 2.5L since new. Since the formula change a few years back, the Boron always gets flagged as low, where-as the old formula never did that. The TBN stays above TAN when I run an occasional TAN on analysis, but it's close to TAN number and why I don't run this oil longer than 5K miles per service interval. You never want your TAN higher than your TBN or TBN lower than TAN (same thing). There's no way I'd consider the advertised up to12K miles. Every engine is different and your results may vary from mine. Analysis is the most important tool in your bag to know how far you can push any oil safely. Needs to have a higher TBN in my opinion to be labeled 'boosted protection'.

I purchased this product for a supercharged Toyota Tacoma. I've used Amsoil products in the past for another supercharged Acura I had. I replaced all OEM fluids with Amsoil and their products performed to perfection. If you are thinking about it, don't. You won't find a better oil.

I highly recommend this oil. I always uses Amoil motor oil. I noticed how smooth the engine feels every time I uses Amsoil. When I change to a different brand of oil the engine doesn’t feel quite as smooth as using Amsoil. Amsoil starts up better during the very cold months here and it’s stays clean longer than other oil that I noticed.

I’ve been using Amsoil for 26 years. This is my second 3.5 eco boost Ford PU. I tow either an 18’ enclosed trailer with up to 5 motorcycles a 22’ IO deck boat. Oil pressure stays the same regardless of ambient temperature or load. Oil temperature and engine temperature are the same bob tail or towing. I change the oil every 5K miles. No turbo issues or cam phaser issues with my 2014 or 2020. I also use Amsoil in my boat and motorcycles. No consumption or indications of issues. Yes, it costs a bit more but peace of mind is worth it.

Am very pleased with this product

Don't you just hate it when a product speaks for it's self. The wife and I, and our 2015 Ford Flex (3.5 fuel injected w/towing package) and off we go again to southern Florida, bass fishing, towing a 16 1/2 ft. bass boat full of fishing gear. Before we go, I change the oil and filter ( Amsoil XL 5W-20). 1 month and 7,475 miles later, always pulling the boat and trailer, we arrive back home. The check oil light has not come on (which senses the oil's integrity also) and there is no oil lose on the dip stick and the engine ran normal temps. the whole trip. Come on Amsoil users, what else could you possibly ask for from your engine oil.

Great service an shipping eng never uses any oil with amsoil products

Toyota highlander 3.5v6 engine less chain noise. Idle speed higher, mileage a little better. Like the product and would recomend.

Excellent product as always. Superior performance. I have been using this oil in my vehicles for the last 8 years and I love it!

I've used amsoil in all my engines since 1992. My 92 GMC has 280,000 miles on it and still runs great, does not burn any oil. Couldn't ask for a better product.

I use AMSOIL in all my engines transmissions and final drives. AMSOIL reduces friction there by increasing fuel efficiency. I've tracked the milage on my two main daily drivers and both had milage increases of two to five miles per gallon. Every vehicle is different and every driver is different so results may very. But that being said, I'm very impressed.

only oil in my vehicles

amsoil is in ALL of my toys and vehicles!

I use this oil in 2 Chevrolet products: 2001 Tahoe and a 2001 Suburban. Both have amassed over 200K miles each using Amsoil Motor Oil and neither vehicle has needed any major engine work such as a valve job, rings, bearings, etc. Both vehicles have 5.3L engines and both have had regular maintenance performed at the manufacturer's service intervals. I couldn't be more satisfied with Amsoil Motor Oil.