Petrol in a diesel !!!!

Petrol in a diesel !!!!

Author
Discussion

BlueFocus

Original Poster:

399 posts

34 months

Thursday 15th July 2021
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Evening,

I have a 2007 1.8 diesel Focus.

Yesterday whilst filling it i realised i had a green pump in my hand not a black one - bugger. In 20 years i have never made that mistake, i guess there is always a first. I put in about £22 worth in.

I managed to find an older post on Pistonheads suggesting if you were to fill the tank with diesel it should be ok as the petrol would be diluted ?

Does that wisdom still hold true ?

I drove it about 1 mile home and haven't used it since.

Thanks

Carlososos

976 posts

97 months

Thursday 15th July 2021
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Filling with diesel is best bet if you can’t be bothered to do anything else. £22 quid about half a tank though so would suggest it’s a risk. If you can get the aa out and get it drained or better yet one of the firms that specialise in draining tanks.

KAgantua

3,912 posts

132 months

Friday 16th July 2021
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What colour is the car?

mike9009

7,041 posts

244 months

Friday 16th July 2021
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KAgantua said:
What colour is the car?
You would need to Focus on it to find out.....

In all seriousness, drain it if you can.

Jazoli

9,116 posts

251 months

Friday 16th July 2021
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If you fill the tank with diesel (they are 55L) it's still 1/3rd petrol, you need to drain the tank, no doubt, either find a garage or call out one of the missfuel vans to sort it, I really wouldn't have driven it though.

lost in espace

6,179 posts

208 months

Friday 16th July 2021
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Brim with diesel, it will be ok.

syl

693 posts

76 months

Friday 16th July 2021
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A third of a tank, I’d drain it completely, wouldn’t worry about flushing it, and refill with diesel. Add a tablespoon of vegetable oil as lubricant if you like, probably won’t help but it’s like saying a prayer and hocus pocus. Keep your fingers crossed, you’ll probably be OK. The older the car the better.

BlueFocus

Original Poster:

399 posts

34 months

Friday 16th July 2021
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Thank you for your replies, will look into getting it drained.

Yes the car is blue !!

cologne2792

2,128 posts

127 months

Friday 16th July 2021
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Millions of years ago, before non-waxing diesel was a thing in WInter, my dad used to near fill his PC Cresta diesel and top it off with a couple of gallons of 4 star.

I appreciate we've moved on and complexities have increased about 1000 % but the principle was fine.

Twig62

748 posts

97 months

Friday 16th July 2021
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cologne2792 said:
Millions of years ago, before non-waxing diesel was a thing in WInter, my dad used to near fill his PC Cresta diesel and top it off with a couple of gallons of 4 star.

I appreciate we've moved on and complexities have increased about 1000 % but the principle was fine.
How is that of any use or relevance to the op or his question ?

Twig62

748 posts

97 months

Friday 16th July 2021
quotequote all
lost in espace said:
Brim with diesel, it will be ok.
The amount of unleaded put in is too much to just top up with diesel. Get it drained and the filter replaced before it is started again. However the damage may already have been done. Personally I wouldn't have started it.

Jimmy No Hands

5,011 posts

157 months

Friday 16th July 2021
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Assuming 55 / 60 litre tank, £22 at an average of 1.35 a litre would be a little over 16 litres. Yes, people used to put a bit of petrol to help with cold starts. 5% ratio is thrown around, whether there's any truth to that, I don't know.

Given the information, I'd get it drained. It's not worth the hassle.

cologne2792

2,128 posts

127 months

Friday 16th July 2021
quotequote all
Twig62 said:
cologne2792 said:
Millions of years ago, before non-waxing diesel was a thing in WInter, my dad used to near fill his PC Cresta diesel and top it off with a couple of gallons of 4 star.

I appreciate we've moved on and complexities have increased about 1000 % but the principle was fine.
How is that of any use or relevance to the op or his question ?
As the OP was asking if using a predominant mix of diesel to petrol is ok, then the experience I quoted is confirmation that it is.

Megaflow

9,469 posts

226 months

Friday 16th July 2021
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Jimmy No Hands said:
Assuming 55 / 60 litre tank, £22 at an average of 1.35 a litre would be a little over 16 litres. Yes, people used to put a bit of petrol to help with cold starts. 5% ratio is thrown around, whether there's any truth to that, I don't know.

Given the information, I'd get it drained. It's not worth the hassle.
IIRC, a mk2 focus has a 50l tank. Which makes it about 1/3 petrol to 2/3’s diesel, which is stretching what’s safe IMO.

That said, it is an 07 focus, it is not worth a huge amount, and if it has only been driven a mile, brimming it and carrying on until it’s about 2/3’a full and brining it again, it’s is likely it will survive for a car that has not got a huge amount of life left in it.

Jimmy No Hands

5,011 posts

157 months

Friday 16th July 2021
quotequote all
Megaflow said:
IIRC, a mk2 focus has a 50l tank. Which makes it about 1/3 petrol to 2/3’s diesel, which is stretching what’s safe IMO.

That said, it is an 07 focus, it is not worth a huge amount, and if it has only been driven a mile, brimming it and carrying on until it’s about 2/3’a full and brining it again, it’s is likely it will survive for a car that has not got a huge amount of life left in it.
What's the correlation between car age and it standing up to being misfuelled?

It's what, £200 quid to drop the contents of the tank and then you're certain, it might last another ten years with maintenance.

But when you need a new fuel pump, injectors, and Christ knows whatever else you'll wish you had just got it sorted properly.

Megaflow

9,469 posts

226 months

Friday 16th July 2021
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Jimmy No Hands said:
What's the correlation between car age and it standing up to being misfuelled?

It's what, £200 quid to drop the contents of the tank and then you're certain, it might last another ten years with maintenance.

But when you need a new fuel pump, injectors, and Christ knows whatever else you'll wish you had just got it sorted properly.
It’s a 14 year old car. The average age of a scrapped car in the U.K. is 13.9 years according to the SMMT. It might survive another 10 years, but statistically it is highly unlikely it has got much more than a couple of years in. How lucky does the OP feel?

BlueFocus

Original Poster:

399 posts

34 months

Friday 16th July 2021
quotequote all
Megaflow said:
Jimmy No Hands said:
What's the correlation between car age and it standing up to being misfuelled?

It's what, £200 quid to drop the contents of the tank and then you're certain, it might last another ten years with maintenance.

But when you need a new fuel pump, injectors, and Christ knows whatever else you'll wish you had just got it sorted properly.
It’s a 14 year old car. The average age of a scrapped car in the U.K. is 13.9 years according to the SMMT. It might survive another 10 years, but statistically it is highly unlikely it has got much more than a couple of years in. How lucky does the OP feel?
That is a fair point.

It is on 160k miles and the bite on the clutch is high.


bearman68

4,665 posts

133 months

Friday 16th July 2021
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Drain it - easy enough to do. Run your lawn mower on the stuff that comes out.

Once you do this, you'll be glad you drained it.

Jimmy No Hands

5,011 posts

157 months

Saturday 17th July 2021
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bearman68 said:
Drain it - easy enough to do. Run your lawn mower on the stuff that comes out.

Once you do this, you'll be glad you drained it.
Indeed. Strange mentality to not want to fix it, I suppose this is why we're blessed with such an attractive second hand car market (though debatable at the moment) because people would sooner scrap and get something else. The mind boggles.

tapkaJohnD

1,947 posts

205 months

Saturday 17th July 2021
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Thinking ahead - I'm getting older and have diesel cars, I'll do it one day - is that 5% rule the safe limit?

5% of a tank full? That would be 12L for mine.
JOhn