Guys, its an older, high mileage car that likely very much needed a good cleaning, why is this so hard to believe???? This forum kills me sometimes... so many [censored] skeptics and naysayers...
I use the Gumout MSTU in my vehicles and all my OPE love it, very good stuff and cheaper than most other so called cleaners. I've personally seen it turn a horrible running lawn mower that would barely idle or start into a smooth running piece of equipment right in front of my eyes. It works, plain and simple! and if it doesn't then your vehicle didn't need it!
