Customer Ratings & Reviews

Normal, quick, and easy order process and quick receipt.

It is expensive, but the ability to change once per year is cost effective. Good oil, engine parts appear clean and wear free!

I've tried all brands of oil from Mobil1 to Royal Purple and by far Amsoil is the best. I can really feel and see the difference. My engine runs cooler with Amsoil and even when I changed it at 25,000 miles it still looked better than all the oils I tried and I changed them at 5,000 miles.

Great oil I change out at 7500 on a GMC Terrain 3.0L. Never had any problems summer or winter. I have 50,000 on engine no serious issues with engine other than regular oil changes. Very happy with this oil

I use this in my gt500. I push the car hard knowing Signature Series has got me covered.

Since I had just purchased a seven year old car with 105,000 miles on it,and not knowing when any of the fluids were last changed. The dealer would not change any of the fluids before and after I purchased this vehicle stating that since the vehicle was not at the factory's recommended change interval (mileage wise) they refused to change any fluid.So, I took it upon myself and I proceded to change out ALL of the vehicle's fluid's.Saving myself hundred's upon hundred's of dollars doing the work myself. As it turned out I chose Amsoil products and even though its only been a month since I changed out these fluids I have NOT regreted my decision.I feel that these product's that Amsoil offer's are by far the best to use for your car...

I use the amsoil products because they are the best of the best , use on my guns, the signature series in my car and filters, great stuff. Try it you won't be disappointed

Great products great customer service excellent shipping time overall great company

Been using in my 2004 Chevy Silverado for years!! Works great.

The enginer runs so much smoother.

I've used this oil in my 2004 Caravan from the point of new. I used it for work and changed oil in the 20,000 to 25,000 increments. The van now has 247,000 on it an it leaks a tiny bit but uses none. At 8,000 miles I need to add 1/2 a quart. No problems here and I use it in all my vehicles and equipment.

Stand behind Amsoil 100% I'd put it in every vehicle I have but some leak so bad it would be to expensive. I would NEVER run anything but Amsoil in a vehicle with good Engine and Transmission.

I was using another full synthetic because that's all I could find in our area. Noticed the other brand would burn off and I'd have to add oil about every 2nd tank of fuel. I switched to amsoil and the burning off stopped. Noticed no difference in fuel mileage or HP gains but like I said, I was already running a full synthetic.... Good stuff!!

Pure Butter!

I use only Amsoil in all my vehicles including my garden tractor. I use the oil, power shot, the Amsoil oil filter's etc. I love it for it's protection and the life of both the oil and filters. The power shot is the best stuff on the market to protect your small engines from water and ethanol. It keeps the system and carburetor clean. I had problems with water until the power shot and never again in the past 6 years. I wish it was in a bigger bottle at a better price cause the small one goes so fast. I live on a budget but make sacrifices to buy all my Amsoil products for my tractor and car and truck. I tell everyone to buy it and have most of my son's using it. The oil last so much longer in both vehicles and especially my garden tractor.......I use to use Valvoline but only now for top off if I don't have Amsoil. The large stickers are on my vehicle engine covers and on my tractor engine cover so others can see and know to a mechanic nothing but Amsoil goes in my engines and gas tank for additives......

I only use Amsoil in my BMW Honda and Toyota

Seems to be working great in my subaru Forester!

I use Amsoil signature series 5w-30 on my Toyota Celica GTS and it makes my car runs great. My car is around 250k miles and I don't have oil burning issues on my vehicle. During the winter time it starts smoothly and it doesn't hesitate to crank. Oil intervals can go longer than 4k to 5k but I usually change them at that point since I drive over 70 miles a day in rush hour. Great oil and great pricing.

Much better than expected.

I used this in my '15 WRX which requires a high shear stability, synthetic oil. This oil was recommended by many websites and forums as one of the top oils you can use. Worked great while I had the car but I plan on putting it in my new Infiniti as well.