How do you use fuel injector cleaner?

Answer 1

Usually tip in a quarter of the bottle in to a full tank for carburettor and injection vehicles. Sometimes for best effects you can pour the cleaner in the fuel tank at the gas pump, then top up with petrol.

If you have a carburettor engine instead of injection you can pour a quarter over carburettor slowly while the engine is running with someone giving a slow rev by lightly pressing the accelerator. Rev the engine hard for a minute then keep the revs up for at least 10 mins.

You can always do a quarter of a bottle of redex (fuel cleaner) to quarter or half a tank, but it isn't very advisable if you're unsure.