I just put in a bottle of grease lighting fuel system cleaner by the recomendation of my brother. I got to the counter and it was $10.00 and i thought is this really worth that much? how come its like 3x's the price of stp or gumout? plus after i put it in i went home and saw an advertisement for it on t.v. and it claims to be better than the competition. In short is this stuff anygood or did i get taken by flashy marketing again