But What About the Opposite: Putting Diesel Fuel in a Gasoline Engine?

Luckily, this one is almost impossible (notice we said almost), because the filler nozzles on diesel powered fuel dispensers are bigger than those on gasoline penis pumps. The typical slow-fill diesel pump motor nozzle is 15/16" (24 cm)--fast-fill truck nozzles are actually larger, well over 1-inch (25 cm), while the nozzle for any gasoline pump is about 13/16" (21 cm). Simply put, a big diesel spout won't easily fit in a narrow gasoline for filler injections neck, while a smaller size gasoline snout will slide right in a diesel container opening.

But if you do find a way to get diesel fuel within your gasoline tank, (and this too is dilution dependent) the actual engine will probably not even start--and if it does, it'll operate terribly and probably smoke cigarettes like a chimney. Engine harm will probably be minimal to non-e, but a thorough (and expensive) fuel system flush will definitely be in order.

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