Customer Ratings & Reviews

Been using this oil for years. It out performs all others.

well above average

I have used this product for over 13 years now and it has proven to be one of the best oils on the market. I got 287000 miles on my Sierra using it. It is now in all of my vehicles

The one oil I have used for 20 years.

Use this in all my vehicles. Great value! Good Performance!

It's my first use of amsoil so far so good

Started using Amsoil in my 2005 Honda Goldwing, it made such a improvement in shifting I never went back to the Honda oil. I recommend it to everyone. Now using it in my truck an motorhome.

Been using the Signature Series Oil now for about 4 - 5 years now. With the price of new cars now days, I want a motor oil for my 2011 Honda CRV to protect my engine in all sorts of climates and I believe the Signature Series Oil does that for me. I use mostly all their oil products in all my engines. 2 cycle and 4 cycle. Protect what you have and it will last longer. The extra price is worth it. Oil filters are great also.

Absolutely love your product and absolutely love your service. I make an order and I always get it within a day or two. Well worth the money! Won’t ever use anything else!

I had an older toyota truck with lots of timing chain tensioner noise, changed oil and put in amsoil synthetic, no more noise, rally lubricates well, tried other synthetics but just dint work as well.

Love this oil for the convenience and how it protects my vehicles. Amazed at how clean it stays before getting dark. I do not think it ever turns black.

i rebuild engines, i use amsoil after break in period for my personal vehicles, hemi engine, super charged grand prix to my Audi turbo charged engine

Great Product

Great oil

Excellent motor oil and delivery time... sometimes ships same day, and it's received the following day or two.. awesome product

Great oil! Works extremely well in my turbo WRX. I continue to change it every 4000 miles along with a filter, but enjoy the piece of mind that comes from running a top tier oil and not having to worry about oil breaking down with the excessive heat and ruining my engine!

Use signature series on other vehicles in past first time using this one. Currently on a vehicle that is a daily driver in winter

Switched to Amsoil 0w40 in my 2017 Colorado from 5w30. Engine rattle on start up went away and engine runs smoother.

Running this in my Genesis Coupe, as is a good buddy of mine. Engine is spotless under covers and the viscosity really goes the 25k miles(40k Km) even under pressure from a very hot Turbocharger. I also drive for a living in this car, so there is a LOT of stress on this oil. ZERO complaints. HIGHLY suggest running the engine flush before using this oil, and doing a change at 15k mi(24k Km) the first time, if you have an older car. This stuff will wash the buildup from the block like those viral pressure washing vids. SERIOUSLY good stuff.

I highly recommend all Amsoil products