3M 08814 Max Strength Fuel System Cleaner - 11 oz.

Excellent fuel cleaner. I am using it regularly on my Nissan Pathfinder ( every 10,000 miles) and feel it gives a good boost to the engine. I get better mileage (on freeway) and also the Engine sound seems smooth on sudden incremental pressure on the gas pedal.

I hoped this would fix the rough idle and stalling but seems there was other problems. I believe it did some good.

I have had my used 2012 Toyota Yaris for 3 months now, and I have taken good care of it. I believe in 3M product very much and I believe it can clean up the gunk and dirty stuff in my fuel tank better than any other product, even though I can't feel much difference so far. I am using it to clean up the dirt accumulated due to the casual use from the previous owners.

I use this once a year in each of my cars, it seems to keep them running well. the most noticeable improvement is when you use it on an older vehicle with may years of not being treated, then you will notice a great improvement after about 2 weeks of driving. Update: this has improved my gas mileage by 2.5 mpg.

Seems to work great. Supposed to have a very high concentration of polyetheramine.