Customer Ratings & Reviews

This product is in my wife's car, which puts me at ease, she won't have problems while traveling.

Love it,great product.

car runs with more pep

Great product! Won't use anything else.

It works great in my 2018 Silverado. Been using your product from 1980. Wood not uses anything esle.

Like all things I'm skeptical, but The signature series has proven its worth both in cost and in performance. I've been given nothing but superior results by this product. Both my trucks have it in them and both run smoother and quieter and with just this change have shown better gas mileage.

use on all my high mileage vehicals...i get about an extra miles more per gallon on average per tank, so big cost savings, plus i only change oil once a year!!

changed oil.

We love using this oil.

Great product at a good price

I only use Amsoil in all of my Vehicles. I have been using Amsoil for many, many years and will never use anything else. When you want the best buy the best AMSOIL !!

the product is great,i feel this will prolong the life of my engine and will be purchasing again in the near future!!!

Using it in my Tahoe change all my fluids expect transmission my mileage went from 14-15 to 18-19. Hope after doing transmission will go over 20.

2019 Subaru Outback 2.5. I went from 26.5 mpg to 29. To 30 mpg. Less engine noise. So far it's great.

Save time

Simply put I love this oil. I've used it in my ranger, 1971 Ariens snow blower. I will say I'd like to give 5 stars however this oil has some consumption issues. I know it takes time to work Amsoil into the engine 2-3 oil changes, however others have noticed this issue as well. My ranger was introduced at 158k ( nothing but synthetic) With this being said I'll stick with AMSOIL and see if the consumption issue I see lessons over time like the company claims. If not however I will go back to Valvoline or Mobil 1 which had the same if not a little lesson consumption for lesser price. Also my engine is spotless just did timing cover gasket and no sign of sludge.

Much better than Mobil 1

Since I used this product I'be been changing my car oil every 7000 miles and the oil is still free flowing even @ 7000.

Use for Subaru Crosstrek average fuel consumption 27mpg..now 30.2mpg!

Great product, it's a 2 hour round trip to do a oil change in my rural area. Doing it myself + the extended service miles is very welcome.