Diesel Fuel in replacement of Fuel Injector Cleaner for a Gasoline Engine?

There are enough detergents in modern gasolines to never need to do something as crazy/stupid as adding any amount of diesel fuel to a gasoline engine. My advice is never try running any amount of diesel in your own gasoline powered car. Ever. Get some fuel injector cleaner designed to work in gasoline engines if you really feel the need to run some injector cleaner through your engine.

IF the diesel fuel mixed into the gasoline is really burning along with the gasoline, the catalytic converter probably wouldn't be harmed (its not like there's lead in diesel fuel to kill the catalyst or anything). Not sure what it would do to the O2 sensor(s), but if it did do anything I'm sure it wouldn't be anything good.

As a side note, have you ever tried to light diesel fuel on fire? It doesn't ignite very easily at all - nothing like if you try the same thing with gasoline. For that reason (among others) I'd leave the diesel as a fuel injector cleaner "trick" to the guy who you saw doing it.

you do not need to clean the injectors on a diesel as the diesel its self does the job just keep the fuel filter clean and no problems all the redex and other cleaners do is put your mind at rest they do nothing for the engine so a wast of money

It takes 12 seconds for the YAnswers page to open for me to be able to click on the [add your answer] box. is my laptop slow?

Hurrah, that's what I was searching for! Thanks to author of this question.