Petrol into my diesel DOH!

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SuperDaz

SuperDaz

Active Member
Posts
114
Location
Stourbridge
Stupidly, I've just put 7l of unleaded into my 2006 TD5. Maybe also stupidly, I immediately filled it to the top with diesel. Will I get away with out doing any damage or do I need to add an additive or lubricant of some sort?
 
I would have stopped at the 7L petrol stage and had a misfuel service come and empty the lot and start again.
Could do some/a lot of damage with the mixed fuels. What ratio of Diesel/Petrol do you think is in there now?
It doesn't take a lot of petrol in a diesel to start causing damage I think.
Others may have brighter news (from their experiences).
 
Its a 60 liter tank ?

So you have put in 7 liters of petrol which is 11.6%. I believe the maximum is around 7% so you 'might' cause damage if you drive it, you could add a small amount of low ash, mineral 2-stroke oil which will act as a lubricant.
300ml would give you around the 200:1 ratio and 200ml is 300:1
Don't use semi or fully synthetic oil ....
Still wouldn't do any long distance high revving activities ...

You could also drain out 30 liters and top up with diesel, reducing the ratio to around 6% which is below the max...

Or be super safe and follow @Anaconda and @DanClarke advice ... likely to be cheaper in the long run.
 
DanClarke said:
I would have stopped at the 7L petrol stage and had a misfuel service come and empty the lot and start again.
Could do some/a lot of damage with the mixed fuels. What ratio of Diesel/Petrol do you think is in there now?
It doesn't take a lot of petrol in a diesel to start causing damage I think.
Others may have brighter news (from their experiences).
Click to expand...
There was 1/4 tank when I stopped to fill up. Put 7l unleaded and then filled to the top with diesel. So it's 7l unleaded in the tank and the rest is diesel.
 
If it was a mechanical diesel; isuzu, 200tdi, etc, I wouldn't worry about it. A TD5 and later aren't as robust. I'd be inclined to follow miktdish's idea. Drain some and top up.
injector/pump seals are fine, they'll be nitrile or viton.
 
Drive with the petrol in the diesel (diluted down or not) and risk some engine damage and a big bill. Or empty the tank and refill with diesel, no risk. I'd drain the tank.
 
Think the pump deuse fuel system only runs at 4 bar on the td5, high pressures are actually generated at the injector itself.
Being a tightwad I would chuck a litre or two of oil the the tank and run it.

I had a td5 years ago and I ran it on all sorts of crap dirty diesel, to be fair it had three lift pumps due to the crap fuel, but no other issues, last time I checked it was still on the road with 185k on the clock.
 
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