Fuel injection cleaner reducing mileage?

I have a 1992 Mazda 626 and like everyone else, I want better milage. One solution I tried be to use valvoline fuel system cleaner. My car was getting 24 mpg back i used the cleaner. after using the cleaner my milage actually dropped down to 21 mpg. Any thoughts or advice on getting more mpg?

Fuel mileage?

try QMI fuel cleaner, it does a good opening. if it does not help, check the injectors, nozzles may be worn and over spray.

Island-land commuting?


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Answers:    It may of late be a coincidence, winter gas sometimes saps mileage. I doubt fuel injector cleaner will make you bring better gas mileage for that tank you add it within, most likely the tanks thereafter the cleaning is done.
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