Small Amount of Petrol in a Diesel
Small Amount of Petrol in a Diesel
Author
Discussion

psgcarey

Original Poster:

612 posts

191 months

Sunday 6th April 2014
quotequote all
Good morning,

for reasons that I'm quite frankly far too lazy to go in to Dad decided to pop 5 litres of petrol in to his diesel car, before diluting it with a further 60 litres of diesel.

I've told him he should be ok, but he is convinced he has destroyed his injectors.

So which is it?

GTIR

24,741 posts

295 months

Sunday 6th April 2014
quotequote all
What car is it?

psgcarey

Original Poster:

612 posts

191 months

Sunday 6th April 2014
quotequote all
Citroen C4 Grand Picasso 08 plate, turbo-diesel of a displacement I have no idea of.

horza

491 posts

236 months

Sunday 6th April 2014
quotequote all
I've mixed 20 litres of petrol with 40 litres of diesel with no ill effects. Should be fine.

wiliferus

4,214 posts

227 months

Sunday 6th April 2014
quotequote all
5 litres diluted by a further 60 should be fine. It would be the high pressure fuel pump I'd be worried about.

I would continue to brim it from 3/4 of a tank up for the next few times, but I wouldn't be losing any sleep.

Jezzerh

816 posts

151 months

Sunday 6th April 2014
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It'll knock like nobody's business but shouldn't do any damage.

Buster73

5,612 posts

182 months

Sunday 6th April 2014
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AA told me as long as it was less than 20% ratio you'll be fine, as the fuel runs down keep topping up with diesel try not to let the fuel run right down.

Davie_GLA

6,876 posts

228 months

Sunday 6th April 2014
quotequote all
I recently put £20 of petrol into my S60 at almost empty. I then drove it ten miles until it died, not realising what i'd done until i thought about it.

Mate recovered it and cleaned it all out, apparently i was very lucky not to have killed pumps, injectors etc.

Volvo S60 D5's are indestructible it seems.

tonygt3

255 posts

252 months

Sunday 6th April 2014
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Very timely, yes I put petrol into my diesel the other day.
When I realised what a fool I had been, I brimmed it with diesel.
Then added 150ml of 2 stroke oil to help lubrication.
Running sweetly, still

Schermerhorn

4,353 posts

218 months

Sunday 6th April 2014
quotequote all
Put some diesel injector cleaner in there, it'll further dilute the petrol in there and help clean the injectors.

A friend of mine went to Europe, the fuel attendant put fuel in for him, not realised that his BMW 530D was a diesel, and put 30 euros worth of petrol in the car before realising it was diesel and then put the remaining diesel in there. He rang me up, I told him to stick two litres of Redex or the like in there, park up at the side and hold the revs at 3-4rpm and burn some of the fuel off. It worked fine and the car never troubled him since.

mwstewart

8,553 posts

217 months

Sunday 6th April 2014
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It will be fine; I've gone up to 50/50 before. Just don't drive it hard until you can get another full tank of Derv.

Roverload

850 posts

165 months

Sunday 6th April 2014
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I put 20 litres of unleaded into my Picasso from empty, got 4 or so miles when she conked out, unbelievably she started again, drove a further 3 miles before I realised what had happened, diluted with 40 litres of diesel, was fine, I think you're in trouble if you put diesel in a petrol car though.

conkerman

3,513 posts

164 months

Sunday 6th April 2014
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Petrol contamination reduces the lubricity of the fuel and the HP pumps are lubricated by the fuel.

Diesel in petrol reduces octane and causes the engine to run like crap Audibly so.

Fill with some premium fuel (ultimate/Vpower) these have a increased treats of additives.

Tampon

4,637 posts

254 months

Sunday 6th April 2014
quotequote all
It should be fine, as commented it it the fuel pump that needs the lubricant from the diesel. I have run a 2006 transit til to chugged to a stop once becuase I fill it up with petrol and drove 20 miles, they drianed it and fill it with diesel and it was fine afterwards. 5 litre in 60 will be fine.

If he is worried tell him to bung in 200-300ml of cheap two stroke oil, load of people do this anyway to diesil to add some extra lube to diesels fuel pumps, some swear it makes them quieter and more powerful as well but I haven't really seen any difference.

Anyway touch of two stroke ( cheaper the better apparently, fully synth isn't worth it) to allay any fears.

DaveCWK

2,400 posts

203 months

Sunday 6th April 2014
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Won't be an issue. There could be more water in your tank than petrol if you filled up somewhere with particularly crappy tank maintenance...

GTIR

24,741 posts

295 months

Sunday 6th April 2014
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It's a French car. It'll be a massive issue!

GTIR

24,741 posts

295 months

Sunday 6th April 2014
quotequote all
It's a French car. It'll be a massive issue!

harry kular

2,784 posts

255 months

Sunday 6th April 2014
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Put 8 litres on my 320d on Friday. Realised at the pumps and put another 52 of derv in.

No issues so far touch wood. Seems a bit more sluggish but otherwise fine over 150 miles.

Topping it up every 80 miles or so for the next couple of weeks though, never less than 3/4 full just in case...

johnny fotze

394 posts

154 months

Sunday 6th April 2014
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GTIR said:
It's a French car. It'll be a massive issue!
Don't believe the hype. Or is it a case of irony not working on the net? In my experience French (specifically Peugeot/Citroen) diesel engines are unmatched. The problem with French cars is the wiring, which comes from a pound shop doorbell wiring kit.

S0 What

3,358 posts

201 months

Sunday 6th April 2014
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If it runs ok i'd add some 2stroke in there just to up the lubrication to the pump and injectors and or run it to 3/4 then top up with diesel 3 or 4 times as and when needed.