Customer Ratings & Reviews

Solid stuff. Nice amber color even after several thousand miles. Price is good too, just wish this was available to me locally.

Incredible product, been running this for sometime now, awesome results.

Been using this oil for years. When others had typical predicted engine failure at high mileage due to manufacturer design flaws, when I had a Ford, my engine kept going. This oil has proven itself again and again. Our 3 Toyota vehicles we now have came with 2 years of free oil changes, and I still chose to use this oil instead. It’s worth it!

This stuff id's some of the best oil I've found and use ALL the time in ALL my vehicles! Just do your research, it does what it says it does. Love the free stickers every order as well!

Was time for the first oil change 6,000 miles on my 2020 F150 5.0 engine. First oil change was free at dealer. They used Ford oil. After the oil change, the idle went up, oil pressure went down, gas mileage went down, and there was a knock at idle. I think the origin oil must have been a Ford Synthetic. The dealer said it was a Synthetic-blend, if so why did the engine change so after the oil change. Ordered the Ams oil Synthetic 5W20 SS and a filter. The engine returned to normal, no knock at idle, pressure came back up, and the main thing, the fast idle when engine is cold went down from 1800 to 1200, (that's a lot), the gas mileage did not go back up, its winter time in Oklahoma, more idling and fast idle at starting. The best thing with Ams oil is the knock at idle is gone. Will be only changing oil once a year or 15000 miles.

I've been using AMSOIL for year's in my 2002 chevy Diesel ,and other car's ,2003 Pontiac VIBE GT [now that's a sleeper car ] and now this new'er 2009 Pontiac VIBE .they ask for the light 5W20 or 0W20 oil so nothing better then AMSOIL 5W20 with a filter . WE get it all here in the middle of the country ,Hot 38C to -40C . I do some personal road trip's 20 hours at a time going into the western mountains , this oil can take it .

The best oil out there

Been using Amsoil 5w30 for years now. Never had an engine issue related to lubrication. And the extended oil changes factors into the price. Highly recommended.

Sig Series is great product! Also ordered upper cylinder lube. Cap hard to get off and seal remover tears and have to use needle nose pliers to get off. Poorly designed. Contacted customer service previously but didn’t seam to care. Will likely purchase other brand of upper cylinder lubricant since it’s a pain to open.

I’m a long time Amsoil user, both for my business (pest control) vehicles because it made sense and personal vehicles for the same reasons.

The best oil for Turbo and naturally asperated engines. You engine will outlast the vehicle, with extended interval as a plus

2,000mi in on this oil change, go to check the dipstick and the oil still looks almost new. Compared to what i used to use Castrol edge high mileage, its a welcome change. If your going to spend the money, spend it right.I have an 03 silverado with 228790mi and I needed an oil to make it last as long as it can, I think I found it with the signature series oil.

Amsoil is the best motor oil money can buy! Been using Amsoil for over 20 years. Every vehicle engine I’ve used Amsoil in, has lasted a very long time with zero failures.

I've used several different products (i.e., automotive oil, 2-stroke marine oil, 2-stroke small engine oil (e.g., for chain saws, leaf blowers, etc.), marine lower unit lube, etc.) for over 20 years. In my mind they are the best in each application else I would not be paying the premium price. Top of the line products are cheaper than replacing vehicles, marine engines (2- and 4-stroke). I believe in Amsoil and I recommend it to others.

Been using Amsoil for about 20 years , motors just last a lot longer when using this product. If its a gas engine I use amsoil , If I had a diesel it would use Amsoil as well. It is just the best .

I purchased a new 2017 GM truck with a 5.3, drained the oil as soon as I got home from the dealer. I’ve used 0W20 from day one without any worries about the DEXOS high jack from GM. In my world if it needs oil, its Amsoil, I’ve used it for decades. If you own a GM product, don’t fall for the hype they push, take comfort in knowing this oil is the real deal and will not fail you.

Been using Amsoil for years, along with filters. Oil feels like it doesn’t need changing when I do change.

I won’t use any other synthetic oil other than Amsoil and I would highly recommend it to anybody looking to find the best synthetic oil

Amsoil is the best oil on the market for synthetics I will not use any other synthetic nor will I go back to straight regular oil. I would strongly recommend Amsoil to anybody in the need of a pure synthetic

I do not use any other product in my vehicle it keeps the engine super clean.