nick205
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 posted on 10/9/12 at 09:56 AM |
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Bugger, Bugger, Bugger - petrol in a diesel
Feeling a total idiot! Manage to put petrol in my diesel Passat yesterday 
Unfortunately I drove it a few hundred yards before it konked out so petrol right through the system. It's being sorted this morning by my
usual garage so fingers crossed for no lasting damage.
Numpty sticker firmly attached to forehead for the next few days
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RichardK
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| posted on 10/9/12 at 10:02 AM |
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Should be ok, it's the other way round when bad things happen.
Cheers
Rich
Gallery updated 11/01/2011
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phelpsa
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| posted on 10/9/12 at 10:04 AM |
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quote:
Originally posted by RichardK
Should be ok, it's the other way round when bad things happen.
Cheers
Rich
Really?
Petrol in diesel causes fuel pump and injector issues, the other way round just causes a lot of smoke in my experience!
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MikeRJ
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| posted on 10/9/12 at 10:10 AM |
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quote:
Originally posted by RichardK
Should be ok, it's the other way round when bad things happen.
Cheers
Rich
No it isn't, petrol in a diesel is far worse than diesel in a petrol.
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jollygreengiant
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| posted on 10/9/12 at 10:15 AM |
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quote:
Originally posted by MikeRJ
quote:
Originally posted by RichardK
Should be ok, it's the other way round when bad things happen.
Cheers
Rich
No it isn't, petrol in a diesel is far worse than diesel in a petrol.
Correct there. Unleaded, even a small amount, nadgers up the seals in the fuel line, eventually leading to, worst case scenario, injection pump
failure.
Beware of the Goldfish in the tulip mines. The ONLY defence against them is smoking peanut butter sandwiches.
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zetec
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| posted on 10/9/12 at 10:29 AM |
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Depends on the system used. My old Ford Focus TDDI went 5 miles down the motorway before dying. System flushed out and still nothing wrong 30K later.
Something said for old tech diesels.
" I only registered to look at the pictures, now I'm stuck with this username for the rest of my life!"
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emwmarine
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| posted on 10/9/12 at 10:32 AM |
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quote:
Originally posted by jollygreengiant
quote:
Originally posted by MikeRJ
quote:
Originally posted by RichardK
Should be ok, it's the other way round when bad things happen.
Cheers
Rich
No it isn't, petrol in a diesel is far worse than diesel in a petrol.
Correct there. Unleaded, even a small amount, nadgers up the seals in the fuel line, eventually leading to, worst case scenario, injection pump
failure.
Don't agree. People used to put up to 10% petrol in diesel in winter before winter diesel additives became more effective.
My good lady put 15 quid worth of petrol in our diesel disco. Having then filled it up fully with diesel it drove a bit smily but was ok. Ran for
another 100k ok.
But even a small bit of diesel in petrol will kill the injection system and the Cat if it gets through.
Building a Dax Rush.
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RichardK
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| posted on 10/9/12 at 11:42 AM |
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I guess Nick will let us know who's right, I know I put about 2 litres of petrol in my octy vrs diesel early on in it's life but as soon
as I realised I brimmed it with diesel and never had any issues.
Maybe I was lucky?
Cheers
Rich
Gallery updated 11/01/2011
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chillis
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| posted on 10/9/12 at 11:49 AM |
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Yeh I've done that er twice
Second time managed to get from uxbridge to dunstable before I even re-alised. Got me home but was V difficult to get started the next day.
Just drained it out and put fresh in but it was painful having to bin 30 odd litres of super unleaded!
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D Beddows
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| posted on 10/9/12 at 12:05 PM |
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quote:
Originally posted by RichardK
I guess Nick will let us know who's right, I know I put about 2 litres of petrol in my octy vrs diesel early on in it's life but as soon
as I realised I brimmed it with diesel and never had any issues.
Maybe I was lucky?
Cheers
Rich
Naaaah I've done exactly the same with my Golf PD TDI (only I put just under 6 litres in), did exactly the same as you afterwards and kept it
brimmed for a couple of weeks - 10,000 miles later it's never even hiccuped.
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nick205
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| posted on 10/9/12 at 12:05 PM |
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Garage just called to say all OK - PHEW!
Had to take the low pressure pump out of the tank to get the fuel out, but a full flush through showed no debris in the system and it's running
perfectly. Fuel filter replaced as a matter of course.
Off to collect now!
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BenB
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| posted on 10/9/12 at 12:29 PM |
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I think people panic too early. My mate filled up his (almost empty) Transit Connect diesel van with RON95 and drove all the way from Leeds to London!
Wouldn't start after switching it off- presumably the sparks weren't doing much and it was just dieselling on the petrol. A quick drain
and all was good. No signs of problems even a year later when he sold it on.
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ian locostzx9rc2
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| posted on 10/9/12 at 01:17 PM |
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Modern Common rail diesels dont like it have seen loads of car which are drained correctly new filters fitted etc then 3 to 6 months down the line
high pressure pumps destroy themselves and metal filings deposit all through the fuel system ...
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nick205
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| posted on 10/9/12 at 03:47 PM |
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Mine's a PD (pre-common rail) motor so hopefully less sensitive in this respect! It seems to be running OK, but time will tell.
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MRLuke
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| posted on 10/9/12 at 04:02 PM |
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quote:
Originally posted by ian locostzx9rc2
Modern Common rail diesels dont like it have seen loads of car which are drained correctly new filters fitted etc then 3 to 6 months down the line
high pressure pumps destroy themselves and metal filings deposit all through the fuel system ...
Isnt that why you have a fuel filter?
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MikeRJ
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| posted on 10/9/12 at 04:04 PM |
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quote:
Originally posted by emwmarine
But even a small bit of diesel in petrol will kill the injection system and the Cat if it gets through.
Sorry but this simply isn't true. Too much diesel will certainly stop a petrol engine from running, but it's is extremely unlikely to
cause any permanent damage to the injection system. Enough petrol in a common rail diesel is almost guaranteed to cause expensive damage if not
caught very quickly, since the high pressure pumps rely on the lubricity of the diesel to work.
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ian locostzx9rc2
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| posted on 10/9/12 at 04:50 PM |
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Fuel filter filters from f/tank only high pressure pump goes directly to injectors so if pump drys out due to petrol in system the damage is done!
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StevieB
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| posted on 10/9/12 at 05:03 PM |
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quote:
Originally posted by emwmarine
quote:
Originally posted by jollygreengiant
quote:
Originally posted by MikeRJ
quote:
Originally posted by RichardK
Should be ok, it's the other way round when bad things happen.
Cheers
Rich
No it isn't, petrol in a diesel is far worse than diesel in a petrol.
Correct there. Unleaded, even a small amount, nadgers up the seals in the fuel line, eventually leading to, worst case scenario, injection pump
failure.
Don't agree. People used to put up to 10% petrol in diesel in winter before winter diesel additives became more effective.
My good lady put 15 quid worth of petrol in our diesel disco. Having then filled it up fully with diesel it drove a bit smily but was ok. Ran for
another 100k ok.
But even a small bit of diesel in petrol will kill the injection system and the Cat if it gets through.
Yep - I did pretty mucht he same thing in Penrith once then brimmed it with Diesel once I'd realised my mistake then drove it home quite nicely
to York without problems (I stopped again at Scotch Corner and filled it up again with Diesel to thin it out more).
If I'm honest, it actually drove a little bit better with the petrol mix, and certainly did another 50k without any issues.
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Fatgadget
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| posted on 10/9/12 at 05:12 PM |
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I thought it was impossible to insert a petrol pump nozzle into a diesel tank nowadays?
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Davegtst
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| posted on 10/9/12 at 05:45 PM |
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quote:
Originally posted by Fatgadget
I thought it was impossible to insert a petrol pump nozzle into a diesel tank nowadays?
Hell no, it's how i make my living. Puttting diesel into a petrol is alot harder due to a diesel nozzle being wider than the petrol one but it
still hapens. I've done 4 cars today, keep em coming
Fuel contaminations
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Dave Ashurst
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| posted on 10/9/12 at 07:16 PM |
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I don't know why but my petrol car runs noticeably better with a dash of diesel in the tank.
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NS Dev
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| posted on 10/9/12 at 07:58 PM |
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friend of mine put petrol in his common rail diesel, tank almost dry before he put it in..............it made it about 2 miles, said he wondered why
it cut out a couple of times.........
new high pressure pump required, I saw the innards of the old one......... absolute scrap.
[Edited on 10/9/12 by NS Dev]
Retro RWD is the way forward...........automotive fabrication, car restoration, sheetmetal work, engine conversion
retro car restoration and tuning
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JoelP
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| posted on 10/9/12 at 08:05 PM |
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I was stood at the pump once cursing it because it wouldnt go in That was shortly after i went back to petrol after years of diesels. Very lucky
near miss!
Beware! Bourettes is binfectious.
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SteveWalker
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| posted on 10/9/12 at 08:42 PM |
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quote:
Originally posted by Fatgadget
I thought it was impossible to insert a petrol pump nozzle into a diesel tank nowadays?
No. Diesel nozzles are the same size as leaded petrol ones used to be, so it is perfectly possible to put the smaller unleaded nozzle in by
mistake.
I think you can buy something that fits into the nozzle and prevents a nozzle being inserted unless it is big enough to operate the release mechanism.
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nick205
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| posted on 10/9/12 at 08:49 PM |
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quote:
Originally posted by Davegtst
quote:
Originally posted by Fatgadget
I thought it was impossible to insert a petrol pump nozzle into a diesel tank nowadays?
Hell no, it's how i make my living. Puttting diesel into a petrol is alot harder due to a diesel nozzle being wider than the petrol one but it
still hapens. I've done 4 cars today, keep em coming
Fuel contaminations
Interesting.
As someone who deals with this professionally can you comment on experience of likely/possible long term damage?
Car in question is a 57 plate Passat 2.0 TDI PD, no DPF. It was driven 2-300 yards out of the filling station before it died. First thought was
I'd stalled it so tried re-starting, but immediately obvious it wasn't going anywhere so pushed/towed from there. The fuel light had just
come on and I brimmed it with unleaded at 3pm Sunday. It was drained and cleaned 10am Monday.
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