Customer Ratings & Reviews

Made the old 5.4 in my dad's truck run noticeably smoother, before it would kinda shake at idle now I swear you could stack dimes on the valve cover. Also picked up around a 1/2 mile per gallon fuel millage wise. This is the second truck we own that I have switched over to Amsoil and I continue to be impressed. I will be switching over the other vehicles we own to Amsoil

Excellent service life. Best possible fuel economy.

175k miles still going strong!!!!!!!!!

Great product and super fast shipping.

Yes, it costs more in the short term, but in the long term, it costs much less than engine repair. Started getting interested in synthetics when I worked in a test lab for mechanical gear drives. Made at least a 10% difference then and have followed Amsoil as it has constantly improved its product.

The only oil i use in my car, when i changed over to amsoil i noticed a difference in fuel consumption and how my engine ran in general. wont go to anything else

I have a 115K miles on my Genesis G-80 3-8 and this is the only oil I have ever used in it. The result it runs silky smooth and I change it ever 10K miles. "Go for it" !!!

I have used Amsoil for over 30 + years and none of my vehicles ever had sludge build up in the crank case or valve covers! Will always use and recommend this synthetic oil!

Great service from day one! The material and information provided me with a very easy process in ordering the right product! Received the product in a very timely matter!

I have noticed better gas Mileage and a way smoother running engine. I can't wait to see how it preforms in the winter. My truck runs much better and efficiently after switching out my fluids. Great oil.

I Have been using Amsoil products in all my vehicles for many years with great results. The motorcycles that I use Amsoil in are high performance, high RPM engines. Inspecting the valve train on these engines tells a lot about the oil you use and I have seen great results with Amsoil.

I have use Amsoil products for my vehicles and lawn equipment for many years (20+) and enjoyed engines that start everytime, first time. The oils viscosity is so great my engine tune ups and compression checks show little to no wear and a clean surface. I was a 'Green bottle" oil user before a friend told about his expeerience with Amsoil products and I switched. So glad I did.

Best Oil to protect your car, great service.

I turn wrenches for a living and have been wanting to check out Amsoil for some time now. I got a couple chevy trucks, 1 with a lifter ticking noise on cold start ever since i got it. I've done few engine flushes with liquimoly or autozone's house brand stuff and never rid it. I used Amsoil's Engine and Transmission Flush and Signature's Series oil and for the first time ever the ticking is completely gone!! they saved me the hassle of ripping off the heads and changing the lifters they made a believer out of me and I'll NEVER use anything else!!

1998 Suburban. 300k miles. Still original compression, still pulling trailers. AmsOil its whole life.

I use Amsoil in my wife's Jeep Rubicon and it keeps the engine protected from all the 4 wheeling we do up in the mountains. We call Amsoil the good stuff.

Very good oil and the price is great fast shipping and customer service is awesome!

Love Amsoil and have for years never a problem.

My opinion best oil out there, low oil burn off, haven't had reason to get into the engine internally for looks, stays the cleanest I've ever had on the dipstick for longer miles though. Highly recommend!

After being a GM vehicle brand user for many years I started noticing performance issues while using Mobil and other large name brand oils that promised best engine oil performance available, WRONG! As many know of the sludge buildup in GM DI motors as well as the fuel management systems collapsing I switched to Amsoil Signature Series and immediately noticed a smoother running engine, better mpg’s and overall performance was just as good 5 years later and with 100k miles later as it was on the day I bought it new. If you want peak engine performance and outstanding reliability then I highly recommend using Amsoil 100% synthetic engine oil and filters. Better for the environment too as less oil changes, less chance of spills.