Liqui MolyCatalytic System Clean 300 ml 7110. Cleans The Injection System and The Combustion Chamber.

When used this, you will see that the mpg mileage increase. I used 2 to clean up the engine check light for catalytic converter problem. It works.

My 2011 Ford fiesta threw a check engine light, got the p420 code, and I let it go for about 6 months. Once I started losing power and had some rough starts, I decided to give this product a try. I figured because I let it go for awhile, it might need more than one treatment. I used 3 cans in three fill ups and the check engine light went away. Thussofar it's still off, I used one more can just to play it safe. I will edit my review if it turns on again, and will note the amount of time that it took to turn back on. As of now, it's been off for a week

Chrysler town and country 2005. Engine light on for months. After add this product to tank. Engine light gone and drive smoother. It is helpful

Works MIRACLES!

This stuff works fastPut it in half tank of gas drove on highway for 30 minutesCheck engine light is off and I am happy

Used it on 2004 Lexus RX330 with 275,000 miles. PO4 light went out and has been off for over a month.

Was disappointed in this under-engineered top. Of course the product I guess works great but the trick is to get the cap off without spilling 1/4 of the can on your shirt/sweater/jacket. I’m am extremely mechanically inclined and went to to the screwdriver twice to pop the top. Don’t do that… the whole orafice uncorks like a shaken champagne bottle. Good luck!

It didn’t clear my check engine light but I do feel a difference in engine acceleration and mileage improvement. So it definitely cleaned the fuel system, just didn’t solve my specific issue. Would buy again.