Petrol in a diesel

Author
Discussion

milo

Original Poster:

40 posts

254 months

Tuesday 19th October 2004
quotequote all
What a clown, I put 12 litres of Unleaded in my diesel. I was told if I double the ammount of Diesel on top of the ammount of petrol, it won't harm the engine.

Any views on this?

lanciachris

3,357 posts

246 months

Tuesday 19th October 2004
quotequote all
syphon it out man.

Flat in Fifth

45,100 posts

256 months

Tuesday 19th October 2004
quotequote all
Let's say you have a 50 litre tank, then 12 litres of petrol is almost 25% roughly roughly if you brim the tank to the top.

It is known that some older diesel engines will run quite happily with this amount of petrol mixed in, indeed in some quarters petrol is suggested as an anti waxing agent in very cold westher. Questionable what a 25% mixture will do to seals, pump lubrication even if you include additives such as Millers.

Drain it off and clean the tank.

eliot

11,684 posts

259 months

Tuesday 19th October 2004
quotequote all
Dont start it, drain it.
You will knacker the pump. Seen it done in a RR 2.5 DSE(Aka 'the slug') - £2500 to put right.

Funny thing was that driver didn't know that they had done it, took it to LR dealer complaining of rough running, presumably spotty teenager plugged computer in rather than plugging brain in and could't find problem. They advised that it needed a new gearbox, took it to an Indy and they spotted problem.


e.

falcemob

8,248 posts

241 months

Tuesday 19th October 2004
quotequote all
I would syphon as much out as possible and fill it up with derv. I did the same thing only put 80 ltrs of petrol in my truck. It lived.

Pigeon

18,535 posts

251 months

Tuesday 19th October 2004
quotequote all
When people first started experimenting with fuel injection in petrol cars, they used diesel injection components. They didn't last very long due to lack of lubricating properties in the fuel. Definitely drain it as far as you can then fill it right up with diesel. If it's been run at all I'd drain the filters too.

Alfa Mad

219 posts

248 months

Tuesday 19th October 2004
quotequote all
I'd second that. Drain as much as possible, but don't worry if you don't get every last drop out. Pump damage only occurs when it runs on undiluted petrol for any lenght of time. You could even possibly drive it to a NEARBY garage without damage. There, they should be able to remove the excess fairly easily. Phone first though!