Review on Hy-Per Fuel Complete Gas System Cleaner By Rislone by Richard Eledge

I've never used anything like this before but I'm pleased I finally gave it a try. I used it in my hot rod 2003 WRX Subie (highly modified/ produces 480+ hp) and it quieted the engine noise a bit but it really made a difference in my 2011 528i BMW. I've had a problem with an engine warning alarm coming on when I really stepped down hard on the gas pedal. This happened twice in the last two months. I added a bottle of Rislone 4700 to a full tank of gas, and I haven't had any more problems. I have my fingers crossed this treatment has solved the issue.maybe I had dirty injectors or something of that nature. The mileage in the Subaru went up slightly but, with my driving style, I didn't really expect much anyway. The mileage may be better with the BMW since I drive it much more sanely. I'm looking forward to my next fill up so I can crunch the number on it.