Quantcast
What is life like with your car? Let us know and win one of three ipads | No thanks
Ask a Question

What's your question? Search here

I put petrol in my diesel car - what do I do?
I put 25 litres of petrol on top of two gallons of diesel in my wife's diesel engined car, then drove five miles before the engine juddered and I realised my mistake.

Pulled up immediately and called out a firm called Fuel-Fix. They pumped out the tank, flushed the engine and gave us a small amount of diesel, laced with some sort of lubricating additive, then sent us on our way.

I'm worried about the long term consequences. The internet offers no reassurance and I've read that damage to the fuel pump and injectors, etc, could cause catastrophic engine failure later on.

Is there anything that could help recondition the engine internals? What tell-tale problem signs should I look out for?

Asked on 20 February 2012 by fastlane

Answered by Honest John
Continue to use the very best diesel with the highest lubricity, which is Shell V-Power diesel. There will be some damage to the pump (that's why the engine stopped). If shards of metal feed through to the injectors, then they will be damaged too. If the fuel consumption rises significantly this will tell you there is a problem.
Dear Honest John,

Please help me choose my next car. I would like it to have:
    Select a few terms below
Similar questions
I have a 2004 Discovery diesel auto. I filled up with diesel at my local supermarket at Chorley in Lancashire. I drove about half a mile after which the...
You recommend running at higher revs to help a DPF to regenerate. I drive a Volvo V70 AWD 2.4d. At 2,000 rpm I travel at 60 mph. At 2,300 rpm I travel...
Thank you for your recent answer about DPF problems with my 56 reg Zafira Design CDTi (150). I have decided to sell it. Your website comments regarding...
Related links
Our Fuel Cost Calculator shows you which will be the best choice for you. Compare the running costs of petrol, diesel and electric cars to make the right choice for you.
Looking for a garage you can trust? Honest John's Good Garage Guide has thousands of reader recommended garages, plus how-to guides and tips on servicing.
Related models
Clever way to carry 6 in 2 rows, like a Multipla, but with Honda quality. 1.8, 2.0 and 2.2 all chain cam engines.
 

Value my car

Amount to borrow
Sorry. The minimum loan amount is £1000
To pay back over

My credit score

;