Cataclean Fuel and Exhaust System Cleaner Gasoline Additive - Safe for Gas, Diesel, and Hybrid Cars & Trucks - 16 oz.

from Allnite

It worked. Pour it in a half full tank. Drove 11 miles with three stops for errands, then drove nearly 30 miles on highway. One more errand stop. Check engine light is off. A week has passed and still no check engine light. Knock on wood. 2010 Volvo XC70 with 113,400 miles.

from GiGi

Wow, cleared out a permanent code on my Q5 and improved performance. I'll be using this on a regular basis as recommended by the manufacturer.

from Featherann

I was about to take my older car to a mechanic but started reviewed cheaper options to try first. This is amazing. It made a huge difference %26 no mechanic was needed after all. I really recommend it!

from crick410

Easy to follow instructions. My check emission light is off and my mechanic couldn't figure it out. Great product

from CC

My check engine light came on and I when I took my car to the garage the mechanic told me to try this. I followed the directions, my check engine light went off, and my car is running much better. Probably saved me a lot of money on engine repairs!