Customer Ratings & Reviews

I purchased two bottles of this PI cleaner after reading positive reviews about it. Though I'm not a regular AMSOIL user, I decided to splurge a little and run this "premium" cleaner through my Nissan Rogue since it has high mileage. I filled up the gas tank and added the first bottle of cleaner. I drove the car until the tank was nearly empty, then refueled and added the second bottle. About a quarter of the way through the tank, the car began to run poorly and lacked power. I did some troubleshooting and narrowed it down to a clogged catalytic converter. Now the Rogue has 2 cats, a front one that is integral to the exhaust manifold and a second one that is downstream. Using a boroscope i was amazed to discover the first cat was completely empty and the debris from it was clogging the second converter. I contacted Amsoil and was told there was no way that could be the fault of their product. "It's just a cleaner," I was told. Now both of my converters are trashed, the forward catalytic converter that was empty was just under a year and a half old and the damage the debris did to the aft converter ruined it. So now I am out 2 converters. Maybe it just cleaned too well and carbon broke loose and clogged the cat. I don't know for sure, but I am not using it again.

Bought a bottle for my truck and my car. Not sure I'll buy this again, no noticeable difference in engine smoothness, performance, or fuel mileage. I'm not sure I'll spend the money on PI again

CLEAN everything . Keep it new

Never noticed 1 iota of difference in the running of our Colorado.

Usually everything goes well and deliveries are within 3 business days which is awesome, but I have been waiting for my order now for two weeks and no sign of it, had to cancel service on vehicle because order was a no show, no tracking number to check on status just that the order was shipped. We don't live that far away so I am not happy and very disappointed.

Noticed no difference

Removes all the impurities from the gas.Vehicle runs smoother.

Don't know if it works. Way to expensive, then put shipping on top of it.

Amsoil products are great. Amsoil as a company, poor. Always charging more than the total paid after the items ship, shipping cost through the roof, taxing shipping... Free gifts now!! Yeah, never saw one of those...