Customer Ratings & Reviews

Been running this oil in my 2008 Silverado 5.3L and just turned 220,000 miles. When I tell my friends I change my oil once a year there kinda in shock, but the proof is in the product!

Runs decent compared to others that allow carbon buildup (gdi life) Analysis showed no high wear numbers of concern.

Have used most top of the line OEM oils. After watching the true tests on youtube this oil is above OEM oil performance. When I started using Amsoil I can tell on every oil change the difference. Holds up better than the ones Ive used in over 20 years. Second to none!

Amsoil is an outstanding product!! Been using just about when they started - yes I am old

Amsoil oil has never let me down or have I ever had any engine problems whatsoever since putting Amsoil in all my vehicles ✊🪵 Fuel mileage even gets better!

If it's AMSOIL, you know it's good!

Satisfied with oil changes!

Use this in my 2020 CRV every 5k, engine runs smoother, quieter.

For the last 10 years I have used synthetic on all my vehicles, both cars and motorcycles. I have never had a problem. I change every 10,000 miles. I will continue to use oil as long as I drive.

This is the only oil I found that met all the specs for my turbo D.I. KIA AND is guaranteed to prevent the silent knock that takes most of them out way before their time. I never need a drop between changes and I change the oil at 3.5 K miles just because I can.$75 bux for peace of mind. Love this stuff!

Have used your oil for several years.MPG has increased vehicle runs better. Will continue to use.

I’ve been using Amsoil oil on my performance cars since 2018 after i discovered them, I have not been persuaded to go no where else. Loyal all the way!

Was easy to order, receive, and use - great product ! I have used this product since my 2023 Jeep Wrangler had an engine swap performed on it, some may shy away due to the price but I'd share with them that in short you get what you pay for : )

I have used a lot of this oil and never had a problem. just pulled out a engine to swap with another and was surprised to find everything on the inside of the engine was clean with no build up or sludge (i do change my oil every 4000 miles).

In my opinion, Amsoil Signature Series synthetic motor oil is by far the best on the market today. It's been the only motor oil I've used on both the 2018 and 2020 GMC Yukon Denali XL's that I've owned. I place my order on their website and have it shipped to my home. I will continue using Amsoil in my vehicles!

Honestly my sierra I drive maybe 3,000 miles a year compared to My daily drive. So for me it's nice knowing I can change it once a year and have the best protection

I like Amsoil products and have used them for many years so I keep buying them

5W-30 Full Synthetic Signature Series is the only oil I’ll run in my Raptor and Bronco. It’s great oil, and I have no complaints!

I drive OTR, expediting in a Ram 2021 Promaster 3500, high roof, extended van. They have the Pentastar 3.6 engine. Using AMSOIL synthetic gives me the added protection need for this engine, As AMSOIL “goes to heat and friction”and does not run from it, like traditional lubricants.

Excellent product! I see an MPG increase when I use it in my truck.