Customer Ratings & Reviews

I started using amsoil products in my Yamaha yz250 2 stroke after I seen a guy put straight gas into his bike. He ran it hard in a qualifying race only to realize what he had done. He tore the top end apart only to see no metal chips to scaring or burning. In fact it run well. All this was no doubt to him usually running synthetic Detonator at a 40:1 ratio, etc. So, I was hooked as others who have made that mistake ended up up damaging something. I have used them exclusively in all my bikes, vehicles and truck. It's more expensive than others but you do get what you pay for. The Signature Series is the Amsoil Flagship and I use it in my Hyundai Elantra GT Sport turbo, and my Ram 1500 5.7liter. ii use the OE in my wife's old 1999 mustang with its 3.8liter. I highly recommend anyone to use the Signature Series if you live your vehicle and want the best possible oil running in it!? Try, it and you won't be disappointed, cheers!

I’ve been an auto tech for 36 years. Trust me when I say I would never use anything else. I use Amsoil products in all my vehicles and equipment.

First time using Amsoil, so far so good! Never heard my car engine run so smoothly!

Superior oil but pricey

This is a good oil, and I trust it to perform as described, but it is a bit overpriced. With Amsoil removing my points, I may be looking elsewhere for comparable motor oil.

I have been using AMSOIL since 2009 and it just keeps getting better. I recently purchased Signature Series 5W-30 Synthetic Motor Oil for my sons Corvette. I won’t run any of my vehicles without AMSOIL and I want to instill the AMSOIL confidence in my son. AMSOIL is the best synthetic oil on the market today so ride with confidence in the heat or in the cold.

FOR MY TWO RIDING MOWERS.. ALSO RUN 5W-30 IN MY CAR AND TRUCK..

Best oil for my 🚗

Been running Ams for 16 years best oil on the market had a 5.7 hemi procharged over 234000 miles on it no problems internally at all thanks to this oil thank you AMS

This synthetic is all I have used in my 97 Lexus LS400, I change every year, it always looks just like new. Would recommend it.

I’ve been using this Amsoil 5W-30 Signature Series Synthetic oil for the past 7 years in my Nissan Maxima and it’s by far the best oil I’ve used, and I’ve tried many others over the years prior to finding Amsoil.. The car now has 155,000 hard miles on it and still runs like new and have beat the car daily since I purchased it 6 years ago with 2,000 miles. . I run Amsoil synthetic oils in all my cars now and won’t use anything else. Best stuff out there and the corporate bean counters don’t seem to have their hands meddling with the product.

I became a faithful user of Amsoil after having a engine built for a 2014 Camaro SS, will use this stuff in everything I own.

Used in my jeep grande Cherokee, performed great even in -40 and colder glad I made the switch

Became an Amsoil Dealer in 1975! Used nothing but until June of 1984 when a car accident put me in a coma for 5 days - broken back and neck in 4 places and right arm almost torn off. Forgot about Amsoil for a few years, but once recuperated I have used nothing but - and I love it - never a bad experience! Well, back to the review of 0W-30 Signature Oil. Excellent oil. Use it now in my 2013 Toyota Matrix AWD known for (sometimes) using lots of oil, instead of the 0W-20 that it calls for. Hitting 125000 miles and still do not use a drop of oil!

A+

I bought a Scat Pack Challenger that calls for a 0w40 oil. Having used Amsoil for the past few years, I knew that this would be a great choice for the 6.4 Hemi. So far, it has been great!

A 15,000 mile drain interval is recommended. There is one problem with that, the oil is just as slippery at 15,000 as it ever was, but by that time there is an acid and moisture built up which can be smelled at about 6,000 miles.

Best lubricant I have found that keeps my engine oil pressure in my truck that has over 240000

Tried this once and have never stopped. 0w40 isn't offered by most or is tough to find. Amsoil is the only oil I trust and have not had any mechanical issues whatsoever.

i order ASEQT for my scag mower and i got AMTQT so i did not use it and got no use for it! just stuck with it!!!!!