Customer Ratings & Reviews

I use the Signature Series in my 2014 Corvette. Their are so many discussions on social media with fellow Corvette owner about what is the best oil. Nearly all say that Mobil 1 is the Holy Grail of motor oils. I tell then that their is a difference between Full Synthetic and 100% Synthetic oils, and that they should do the research. That said, oils with no petroleum base stocks are clearly better for our Direct Injection engines. I am sold on Amsoil. Thanks for your great product!

Great oil. It’s such a hassle trying to find 0w40 for my Ram 2500. AMSOIL makes it convenient to order and it’s a great product. My only wish was that AMSOIL would carry WIX XP oil filters for my vehicle.

Well worth it.

I've run AMSOIL Signature Series in all my vehicles since the mid 90's. All of which were/are Ford HD trucks (F250's & F350's), gas and/or diesel. I change oil/oil filter on regular intervals which is usually between 5k and 7k miles and within 12 months. No matter what vehicle I run AMSOIL in, I get every drop back when I empty the old oil out of my oil catch pan. (I refill the empty bottles with the used oil). I have never experienced any type of engine issues what-so-ever in all these years regardless of the mileage on the vehicle. Sure it's a little pricey, but it's a lot cheaper than rebuilding an engine. I have no plans of changing.....ever! EA

Always use Amsoil oils

I run amsoil in every engine I own. Cars, mowers, boats, etc… all I will ever use or recommend. Shipping is fast!

I was very surprise as to my truck responded to this oil. My gas mile went up 3 more miles per gallon -13 to 16 . With an oil additive the miles per gallon increase another point (17.5) . I would definitely recommend this oil . I have a 2005 DODGE RAM 1500 with a 5.7.

Keeps truck running like new

Have used Amsoil 5w30 signature series in my truck since it was new. Runs as good today as it did then, I wouldn't use any other motor oil. I use Amsoil in all my engines ( motorcycles, four wheeler, lawnmower, car and truck).

Heard about this being the best, and I think it is. Use this stuff for my 4-wheeler as well. I drive for Lyft and I think AMSOIL has what it takes.

Like all Amsoil product this oil does the job. Just finished a 5500 trip in my 2010 Yukon Denali. The engine used a small amount of oil. I wouldn’t trust any other oil.

Ever since I started using Amsoil signature series, my Q50 runs BETTER!

Have been using this product for many years. I change my oil once per year and the oil works excellent!

I’ve heard great things about Amsoil and decided to use their oil for my next oil change in my 2018 GMC Sierra. After putting a few miles on the truck since the oil change, I swear the truck runs better and smoother. I definitely will buy this oil again for my next oil change.

Befor Amsoil, i used other brands in my family's cars. And let me tell you, there isn't any as good as Amsoil. In my family we own toyotas, Mercedes Benz, Audi, Chevrolet, Nissan, Honda, BMW, Acura and Smart. And evry single one of them uses Amsoil. It made a big difference in all of them. Please give it a try and judge by yourself. 100% recommended!

Great oil .just moved across country and no problems.

I tend to own all of my vehicles long term and always use Amsoil Signature series. My 2001 truck I bought used at 115,000km currently has 378,000km and gets the oil changed every 6 months averaging about 15,000km per change. I also have a 1999 Sunfire that I bought with 66,000Km on it and it's now at 450,000Km and still going strong.

Best oil on the planet !! Using since 1999 on everything that I have that has a motor... Engines are very clean inside ..

Had Amsoil signature series full synthetic since the first oil change. 225k miles and going strong.

Excellent service, with great product, awesome combination