Petrol in Diesel car - The End?

nvingo

I guess it depends on what it is that's damaged by the presence of petrol / the wrong fuel.
if it's that petrol corrodes seals or components that are used in a diesel system, one built from petrol-grade components that also work with diesel wouldn't suffer.

Greg Hook

I did this to a 3ltr diesel beemer I had a few years back. Put about £15 of petrol in before realising then filled the rest up with diesel. Never had a problem with the car.

I haven’t a clue about mechanics/engines etc, but I’ve always been informed that putting petrol into a diesel is far less an issue than doing the opposite.

marksovereign

Its the opposite way round Diesel into Petrol is ok but Petrol into diesel is definitely not.  The key is if you realise what you've done don't start the car.

SyStemDeMoN

No, Petrol into diesel is ok as long as its not too much.  In the old days us truckers used to put some petrol in the tank to stop the diesel freezing in the winter.

Ron240

Am I right in thinking it is not possible to put diesel in a modern petrol car because the nozzle is too big to fit inside the tank?

Bl4ckGryph0n

It was in old school diesels. But with modern high pressure common fuel rails I wouldn’t do it. Heck the old diesels could run on nearly anything.

nvingo

When we had 2-star, 4-star (leaded, red nozzles) and diesel (black nozzles), all nozzles and fuel fillers were same size. To stop drivers killing catalytic converters by putting leaded fuel in, the size of the filler on cat-equiped cars was reduced (for unleaded, green nozzles), so as you say a diesel nozzle shouldn't fit a current petrol vehicle, though it would still fit pre-catalytic or 'classic' cars.

Delvey

Using older vehicles, probably would cause failures on newer ones due to more complicated systems