Customer Ratings & Reviews

I use the Signature 10W-30 in my 2015 Ford F-150 Lariat SuperCrew 2WD w/3.5 EcoBoost and 3.15:1 gears. I also use a dual remote oil filtration on my engine. I chose the 10W-30 over the recommended 5W-30 due to the lower volatility rate of the 10W-30. No issues for 5 years. I average 25.4 MPG on the highway. With the average fuel savings using AMSOIL, to me it's like getting my oil changes for free.

I have used this in my two Toyota vehicles for the last 7 years. I have never had any oil usage between oil changes and it goes the recommended distance.

I have been using Amsoil in my vehicles for over 12 years have reading about its properties. I wanted to look after my investments the right way and I will use nothing but Amsoil.

I was forced to use AMSOil in 1980 for a blueprinted VW engine; the valve train was wearing quickly. As soon as the rings seated, I switched to AMSOil and the wear stopped. I've used the 5W30 in my 89 GMC K1500 since break-in, and will continue to do so.

This oil, 5W30 SS, like all AmsOil products are outstanding. I have been a dealer/preferred customer for 39 years and have found nothing better. The tech support is equally outstanding. The only problem I have is changing the oil myself, I am 78 and on Oxygen 24/7 (but I do it anyway). I Keep vehicles a long time (22 to 26 years). I used to change my oil every 3,ooo miles. Now I do it once a year or longer. Thanks guys, keep it up.

I wish I would of known about amsoil and the attention to detail of their products with the science backed knowledge. Awesome stuff and makes the cars perform top notch

Awesome product used them all my life

Switched to this oil on my 2017 Ford Expedition EL XLT. Average gas mileage increased from 18.1 to 20.2!! Expensive? Not really! My oil change shops charge me 115.00 for a premium oil change and there is no telling “what” they put in my truck. This oil change along with the amsoil filter was 120.00! I am going to let it go for 15K and that means it just cut the price in half compare to the 7.5k I was doing before!

I have been using AMSOIL for years I’m am a master technician for 36 yrs I have never had a internal engine or transmission because of AMSOIL and consistent fuel mileage and cooler engine and transmission temps. AMSOIL is proven great product.

I have a 2001 Nemar Dutch Star motor home with the 8.1L vortec engine. Wanted the best for upcoming move to Texas... Hope my gas millage comes up a bit. :) Bob

One of the best oils out there. Been using it for years without any issues.

I like the oil prices are not too bad when you consider how much better it is I was mobile 1 users before AMSOIL

This is my go to oil for my last four Jeeps. When I sold my Jeeps, they had long past the expected mileage life and still had almost original MPG usage. Always started, ran smooth, and did everything I would expect an engine to do.

1. True Story. After Hearing the Ratings of this Oil, a Welder friend of mind, Soaked a Perfect Peace of Metal in AMS OIL for safe Keeping to prevent rust. it Seemed like a great Ideal for the Job at hand that was scheduled in 6 months. The Oil had penetrated the Metal sooo Deep that is could not be washed with 3 of the Strongest Soaps and could not be Sanded off. The Metal would not keep a Weld Together. 2. My Fan Belt Suffered a Snow Bank and Stopped Working during the Winter. The First Hot Day of Spring was shockingly HOT and the Motor was Running the RED. URGENTLY I Stopped the Motor on the Road Side and turned on the Interior HEAT to Cool Off the Motor. I started it back up for the prestone to circulation. The Hot Needle went down and The Motor Never WARPED and Never Stopped Running but it did start to Burn one Quart of Oil which brought me right up to the next scheduled Oil Change. Oh... by the Way... My Much younger cousin bought that car and SHE was NOT mechanically incline to know about Car Maintenance and RAN that Motor DRY for at least two weeks with Just AMSOIL Residue on the Metal. No Problem. 3. My WORST quality is Procrastination. So... I know I Have to Pay for the Best Oil if i don't make an Oil Change On time. With AMS OIL, it takes the Stress out of Worrying and to go the extra Miles with Peace of Mind.

Have used Amsoil for 25 plus years & it hasn’t let me down YET!!

First time using Amsoil. So far couldn’t be more pleased. Longtime user of Royal Purple but now am sold on Amsoil. Could feel the difference immediately after startup after oil change. Smoothness of engine running is unreal.