Customer Ratings & Reviews

Bought this for my Ram TRX.. Wanted the best lubrication for this beast of a truck!!

I wouldn’t use any other oil than amsoil!

This is just my opinion but I think AMSOIL is the best synthetic oil on the market. Worth the money to me

I 100% recommend this best oil you van buy

I replaced it due to low oil pressure. I will continue to use this oil in my diesel and with more research may be my boat

The best!

Excellent oil! Keeping my Hyundai Santa Fe running like new with 273 000 klms on my 2.4 L GDI motor. The inside of the motor is spotless!

This is the best oil ever! I have been using it for 7 years and ad it protects my engine best.

Amsoil is without a doubt the best oil money can buy. Project farm on YouTube did the most in depth review/comparison I’ve ever seen and amsoil came out on top. For long term engine protection, it simply doesn’t get any better than Amsoil signature series.

I use this product for my RAV4 2020 LE my car run smoothly and the the winter I'm using the same product thie the summer see what happens

The only oil I run in all of my vehicles

Best motor oil available

✔ Started using it in my 1999 Ford Ranger – Engine lasted 300,000 miles, immaculate condition. ✔ Chassis rusted out, but the engine? Flawless. That tells you all you need to know. ✔ Now using Signature Series in my 2025 Ford Maverick 2.0L EcoBoost – Switched at 500 miles right after break-in. ✔ Turbocharged engines need the best protection – AMSOIL lowers temps, reduces bearing friction, and maximizes longevity. ✔ Plan: 8,000-9,000 mile intervals with annual oil testing to monitor engine health. 🔹 Final Verdict: If you own a turbocharged engine, this is the oil you want. It’s not just marketing—it actually delivers better wear protection, stability, and performance under extreme conditions. Simply the best.

Excellent oil - eliminates the dreaded lifter tick on the Jeep hemi 6.4 liter. Deliver is supper quick. Great service, great product.

Best oil around! Won’t use anything else

Awesome product could tell a difference in performance and oil still looked new

A+++++++++all the way!!!!!

Well after check on alot of oil test on internet, , Amsoil had they best drain when in cold weather,

Only oil I’ve found that might do better than Valvoline

Have used AMSOIL's P.I. Improver since it first came out. Still use it at 1 oz. per 10 gallons. Have never had a fuel related issue and all of my vehicles get fuel mileage like they did when new.