Adding IC5 Fuel Injector Cleaner in the fuel filter [SOLVED] Asked by John H. In Texas Is it safe to add the Sea Foam injector cleaner directly into fuel filter then turn over to run engine?
Hi John. Yes, it would be safe to prime a fuel filter with IC5 fuel injector cleaner. If it were me I would combine with Sea Foam High Mileage! Make sure you fill the filter to the top.