Alright BIOTGER's my question is what fuel system cleaner has the most PEA? I have been an avid Gumout high mileage regane user until the multi system tune up came out. I've used it and now I see there is a Gumout One n Done. Also I know redline and techron has pea as well as the 3m cleaner. My wifes prius had a gummed up injector recently (it's been cleaned off the car) and would like to incorporate a fuel system cleaner into her maintenance schedule. Is the gumout one n done really that much more concentrated where you really should only use it every year? Would I get the same results in say using 2 cans of multi tune up? Is there such thing as overdosing with these?