5 Pack Boost Up Vehicle Engine Catalytic Converter Cleaner Three Way Catalyst Cleaner

This stuff is awesome!!! I went to to advance auto parts one day to get my check engine light looked at. It said O2 sensor. I threw in a bottle in the gas tank and filled up. With in 24 hrs. My light was gone and I rested easy for a couple of months. I drive back and forth to West Palm weekly. Great product!!!

All 5 bottles arrived in pristine condition brand new!! On time thank you!

Man this stuff really works great. It turned that check engine light right off.

Car runs better and cleaner

it took 3 days for it work made a big difference.

you will have to use it a few times to get results. as for the catalytic converter cleaner I'll know if it's still sets off my check engine light at a later date.

still to early to tell if it works, but the bottle neck is to small go into a gas tank thatbhas no fuel cap. i have to pour it into another bottle in order to put it into the gas tank.

They should tell the buyer how to use it properly before it's purchased. The tank should be almost empty before this item would work for you. Guaranteed with this product if properly used. I'd like to see this first on the commercial before I purchase.

one bottle was leaking when it was delivered it seems like it it was just water and a little alcohol with water in it it had no smell of distillate and when I put in tank of 2 different cars it started acting like water in the tank.dont buy this .I had to buy a bottle of heat to remove water

I can't review what I never received, wasn't delivered to me and when I requested an explanation, I was told that I will receive a refund, which I don't receive yet