Customer Ratings & Reviews

I started using your Signature Series Oil in my 2010 Ford F-150 SVT Raptor for the last three oil changes. I've seen an average Fuel Mileage increase of 2 MPG. Because of this performance, I've just started using Amsoil in my wife's Ford Edge. I expect to see fuel mileage gains in that vehicle also. I've experienced the benefits of Synthetic Lubricants and have used them in all my machinery for many years. Very happy with your product and your On-Line store.

love using this oil. nobody has a super great time changing the oil every few months like in the past with regular oil. with this about once a year I make arrangements to get it done.

There is no other oil I will use but Amsoil!! I’ve used it at least 30 years! I’m a retired Firefighter, even when it was 30-40 degrees below zero my vehicles always started when the pager went off. I use Amsoil in my Pickup, SUV, Outboard motor, Lawn Tractor, and Snowblower. It’s always has done an Outstanding job for me.

Amsoil is the only oil I put in any of my vehicles

The best way to treat your car or truck.

I’ve tried Mobil 1 Full Synthetic and Chevron/Havoline Full Synthetic. Both oils would give my engine just a little tick on start up when it was below 30 degrees or so. No tick so far with the Amsoil. The lowest temp so far has been around ten degrees. Very happy with this oil.

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.