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Fuel injector cleaner

fuel injector cleaner for gas tank …good or bad???

Mostly not needed. For use as a preventive measure, good, but you probably won’t ever know if it is money well-spent.

If you use one, use a good quality one like Techron, Seafoam, etc, in accordance with their instructions.

Pretty much a waste of money. Gas has cleaners in it already and any cleaner made has no effect at all on the main source of fuel contamination; grit of various sizes.
Cleaner may help rid the fuel system of moisture but if a moisture problem exists then the engine will miss or surge.

If the car runs fine, save your cash.

thanks for the heads up