Customer Ratings & Reviews

I've been using Amsoil Signature on my 2020 Silverado RST Z71 since it was new. Absolutely the best oil on the market, hands-down! While it is a little more expensive than regular store bought oil, the peace of mind and the ability to go 10,000+ miles on an oil change is an exceptional trade off. Id definitely recommend all new American trucks owners to use Amsoil Signature, it just doesn't get any better to protect your investment

I've used this product on my 2021 Ram 1500 since my 1st oil change and it has performed great. The extended oil change miles are a big help when driving a lot of miles. It's a bit expensive on the front end but the long term pay off is well worth it. I just hit 99,000 miles on this Ram and this product is superior to any of it's competition.

Put new Amsoil in my 2000 Tundra. Engine runs so much smoother. Great oil.. Fast service and shipping. Had product in about 5 days after ordering online.

Best synthetic I have ever used. Years ago I started with the red horse oil, then switch to the oil with the funny color. They worked good but Amsoil seems to make the engine run smoother and oil is not as dirty as milage increases after oil change.

Motor seems to run smoother and oil is cleaner as milage increases.

I have a twin turbo 3.5 ecoboost f150 and I personally notice a fuel economy difference from 14.6 miles per gallon, to 16.3 average. I’ve also noticed that every oil change the oil comes out cleaner and doesn’t smell burnt. I change my oil between every 1,000 to 2,000 miles. Overall engine performance is a little better, turbos spool up better and hold pressure higher and longer. Highly recommend this to anyone who is looking to switching to AMSOIL. Shipping and handling is also very fast and handled with care.

Great product, ordered one day, order arrived the next day

I used the Amsoil engine flush and Signature Series oil but it didn't help on the oil consumption at all, in one of my vehicles, but I do trust that it is a fine oil. In one other of my four vehicles I used the Amsoil in, it hasn't used any oil, but it barely did anyway. So it's too early to tell on that one. I'm kinda also bothered that I spent over $200 on my order and received a free gift of three (a whole 3) Nitrile gloves and a few silly cardboard funnels, which I threw away cause any car guy already has a good funnel:) I thought these were just normal order throw-ins, but I see now, from an email I got, that now they send a nice headlamp with a minimum $70 order! Guess I'll have to time out anymore ordering according.

Still clatters on start up.

2017 Sti grabbed extra 2psi off engine oil Car runs smoother This is Fiji water but for a car 5 stars!

I have used several different AMS oils from motorcycle to motorhome all work good.

I have used Signature Series in my wife’s Subaru’s for 18yrs. Never had any issues ever. I Run it between 15-20k. Never to 25k.

Upgraded my Mobil 1 High Mileage to this Science Beauty, you can definitely how smooth the engine feels, also I have use it in a car that I do Uber with and by the time it had 5000 miles the old Mobil 1 needed at least one more quart of oil. So far on Amsoil and 6000 Miles hasn't burn one drop

Meets the tough requirements of Dexos 1, Gen III.

SINCE PURCHASING NEW FORD VEHICLES WITH TURBOS I SWITCHED TO AMSOIL FOR DURABILITY AND LONGEVITY.

Frist I tried on my 2014 GMC SIERRA now I use it in my wife's car and My Cadillac Escalade

Cheaper than an engine warranty and more effective.

If you are serious about maintaining your car, this is the single most important protection you can buy. More expensive because it's worth it. I can change my oil every 10 -12K miles and the oil analysis is still better than other oils at 5k.

Have been using this product for over 40 years. Use Amsoil product for all engines.

Excellent oil. I keep vehicles long term, Amsoil helps tremendously!