Customer Ratings & Reviews

Used in my Tahoe the day we left on vacation to the Tennessee Mountains, when we did leave I could noticeably tell a difference in performance and throttle response. At the pumps I was averaging a 1-2mpg gain. With that I would highly recommend.

Well, I've tried just about all of the fuel (Non $3 special Lucas upper ring lubricant additives), aka $$$, and have meager results for the money that was paid. Tried Lucas (Various), Liqui-Moly Fuel Treatment, VP Racing, Chev Techron, Marvel MO (Need to Test More), and Royal P. Only one that made a difference for more than 1 week was MMO, well, until I found this from Amsoil. Not only has this improved my fuel economy, my engines purrs with the injectors being as clean as this got them. Suuuper smooth, restored a lot of lost HP and TQ. I love Amsoil!!!

Just started using, car has low miles. Haven't notice any big changes yet, seriously doubt I gained HP, but? Use with Upper Cylinder Lube. As long as it keeps inside clean it will be well worth it.

After adding and driving a few miles, I noticed my engine went to 4 cyl operation and stayed there for quite a while. The engine seems more responsive and continues to run on 4 cylinder operation more frequently than in the past - better milage.

With product added to my vehicle I’m getting better than manufacturers stated mileage per gallon.

I use every 3 tanks

Made a difference!

J'avais 2 codes "check engine" P0420 & P0430, faisant rapport au catalyseur et oxygen sensor qui se sont effacés après un seul traitement. De mon côté ce fut bénéfique :)

Very noticeable difference in the way my car 2014 ford taurus sho runs with a 2 mpg so far

Great product

Love amilsoil products been running them in all my vehicles for 5+ years!

We tend to keep our cars a long time so this product helps to keep them running smooth.

GREAT PRODUCT! I use it on every fourth fill up. I believe it helps with performance as well as keeping it running smooth and clean.

Great stuff

Noticeable improvement and piece of mind protection.

Anytime the oil change is due

I use it after every oil change. Works great.

I have used Amsoil products for over 20 yrs now. All my boats, cars, trucks, snowmobiles, lawn equipment, if it uses oil and I own it it will have Amsoil. As long as this company continues to outperform in product perfomance and customer services I will continue to be a dedicated customer. 5 stars! And to think I got nothing to write this review Good job Amsoil! keep it going!

I add product annually. I noticed a good improvement in performance and fuel economy immediately.

Love this product, started using at every pil change. Smoother idea and improved gas mileage.