Customer Ratings & Reviews

makes sense to use this in your gasoline engine... the crap fuel being sold is damaging to our engines. I am convinced Amsoil knows exactly what they are doing. I am a loyal customer and user of their products.

Now this Gas Additive does WORK. Have used it in the Motor Home for 12 years now and all the other vehicles I have. It does improve the gas mileage and I certainly get engine performance out of it.

Works as designed...a little more expensive than the store products.

Fantastic product. Does what it says it will do!! Love it.

I add the gasoline additive every 4,000 miles.

I place this in all four of my cars and this increases the mileage by 5% on 3 out of 4 cars. My pickup actually gets 2 miles more with this in the tank.

Noticeable improvement in power and mileage after use.

It helps maintain your injector while keeping your gas octane high and perfect for your engine

This stuff after 4 tanks made my old clapped out civic feel like it had another cylinder and boosted the gas mileage by 5mpg.

I give my BMW S1000XR a splash with every tank. It keeps the fueling flawless, mile after mile.

Not how the directions say but I usually put a few oz in with each fill as a maintenance dose. I usually buy nonalcohol top tier gas which means it has a good amount of cleaners added at the blender. I drive my daily drivers over 300,O00 miles and so far no O2 or fuel injection problems. Fuel pumps usually last about 200,000. I drive my dailies over 300,000. Also have '54 inline 6 with 6V points ignition. Plugs stay clean for 10,000 miles which is my replacement interval.

seems to work as listed.

Use it mainly to keep the injectors clean for a smooth HP 2017 5.0 Coyote. Appears to do just that. No negatives!

Put this in before a long constant mph drive, big difference in mpg for a new V8. Good for the recommended interval.