No problems in three vehicles that get Marathon 87 octane most fillups. It's sister brand is Speedway. Once a year, I put a maintanence fuel injector cleaner (Techron) into the empty tank - then only fill the tank half-full. I won't do it if I burn all the gas within a day. I like it to workclean longer... at least for a few days.
I read that the additives are NOT the same as STP in a bottle, nor are they from STP themselves. Basically bought from another supplier and rebranded as STP products.
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I read that the additives are NOT the same as STP in a bottle, nor are they from STP themselves. Basically bought from another supplier and rebranded as STP products.
No, as far as I know, Marathon, at least around here is not top tier. I was thinking about either trying them or the Holiday Gas stations around here, but seem to always lose about 2-4 MPG on the Holiday gas