Customer Ratings & Reviews

trust AMSOIL products

Engine runs smooth, and better mileage,

Trips out west get you ethanol gas mix. Hoping this cleans out the remnants.

Works like it is advertise and maintains my fuel and engine clean. I recently had a clogged fuel injector and it was throwing a code. I threw in a bottle before my fill up. As I was already had plan on taking it to the mechanic to see if we could get the fuel injector cleaned out or replace. The code went away and I gain back my 2.0mpg I had loss. Now every month I run a bottle of it in my vehicle to maintain my fuel and engine happy

Periodically add to SUV when filling tank. Improves performance and easy to use. Highly recommend.

One bottle every month my suv runs so smooth and quiet.

Use in my vintage car with every fill up. These old cars may not be the best at lubricating their top end. Having the fuel with extra lubricants and anti corrosion agents coating the valves reduces wear and improves performance

I'm a l9ng time user of Amsoil and highly recommend all of there products. My son bought an 88 Mustang GT that had low mileage but some lifter noise so I purchased a bottle of Amsoil Upper Cylinder Lubricant and added it to a fresh oil change. I immediately noticed it quiet it down .

The engine is smoother and quieter when using this product daily. I also noticed a 1-2mpg difference on highway when it is on a full gas tank. The acceleration is much smoother at light and part throttle on the highway.

Not a big fuel additives fan. But this stuff after a few tanks? Shows a difference in overall protection

put it in and it works great

Between a bottle of UCL with every full tank or two half-tanks, Signature Series motor oil, an EAO17 oil filter, and always using Top Tier fuel, the 3.0L TT V6 in my CT6 still runs strong. Have never had an oil-related issue, have never had a problem with the turbos, and mechanics tell me the engine looks great, especially considering it’s 10 years old. Same with my wife’s 11 year old Terrain with the 3.6L V6 - runs strong, looks great. I’ve been using AMSOIL in my cars for over 20 years and II can’t recommend them enough. I’m a customer for life.

I use this with my all my vehicles. Great product and great price. Wish it was just a bit easier to get the white seal off the top of the bottle. It's still the best.

If this was made by anyone else I probably wouldn't buy it. But I have confidence in Amsoil, and I trust their products because my vehicle has started running better, and shifting better with the Signature Series transmission fluid which has outperformed the Mopar 8-9 speed fluid I used to run in my Jeep. Great company making great products.

I started using it my 2017 Tundra and increased the fuel mileage by 1.5 miles and the power is crazy ridiculous now. Sold on it and used it in my Can Am side by side too. It is quieter and smoother running

I use this with every non tier fill up and for all extended road trips.

Honestly you can beat this company. I got the info from the “legit street cars” YouTube and because a preferred customer. Not only to I save money but they give me all the information I need for my vehicles on the site but they deliver it to my door. I’ll never go back to another company

When I saw this, I had just read an article on upper valve deposits. Most EFI vehicles have this issue. Added a bottle at 1/2 tank and filled. The upper intake tapping at cold start has almost been eliminated, still have 1/2 tank left. Will probably run another tank of this, followed by tank with P.I. Engine is quieter, smoother running and have gained 1 mpg. Vehicle, 2015 Crosstrek with 97000 miles. It does seem to have made a difference.

Have Not had Any Adverse affects from using this product.

You'll really notice the engine getting quieter and the idle smoothing down after using this product. Peace of mind knowing that the valves and seats are getting a good clean and lubrication.