Well, Techron is a fuel injector cleaner, but it also claims (and rightly so) to do much more than that. I would expect that manufacturers would design their fuel systems to be able to tolerate a wide variety of cleaners, or else pay some heavy warrany costs. Most cleaners, after all, have a lot of common ingredients between them and it wouldn't be tough to design materials and coatings to tolerate those ingredients, in addition to the normal gasoline, ethanol, methanol, etc. I think this advice is hooey, especially considering the Top Tier Fuel push, posted here recently, in which the automakers are trying to get the gasoline companies to increase the detergent properties of their gasoline (adding cleaners).