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mustafasoleiman



Member Since: 21 Jun 2016
Location: London
Posts: 103

United Kingdom 2003 Defender 90 Td5 XS CSW Indus Silver
unleaded into diesel
Spoiled by my wife's electric Mini, yesterday I put 14 litres of unleaded into my 2003 TD5 before realising the error of my ways... Embarassed

After some discussions with the pump manager and my garage I decided to fill the remaining 36 litres with diesel.

I then drove home and it seems all right... Planning to top it up asap with more diesel for a while...

Do you think I should be all right?

Thanks

Alex http://instagram.com/h4vou/
Post #990674 28th Apr 2023 10:38am
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Cragster69



Member Since: 15 Jun 2021
Location: Scotland
Posts: 164

Scotland 2007 Defender 110 Puma 2.4 CSW Cairns Blue
When I was a student (20+ years ago), I had a delivery job and filled the diesel tank up with unleaded. I managed to get to where I was going but it wouldn't start. I had to syphon out the petrol and my boss turned up with 20 litres of diesel and a new filter. The van was fine afterwards, I couldn't go near naked flames for a week though.

A boss at another job, put petrol in his diesel tank but stopped after about 5 litres and realised his mistake. Called his recovery company, the mechanic who came out told him it would fine if he filled it up with diesel and didn't let the level go below 1/4 full. He also told him that adding petrol to diesel used to be a thing for diesels when the fuel would congeal during the colder winter months.

A quick google: If you’ve added more than three percent petrol to a diesel car, you may experience decreased engine performance, stalling, and possibly even engine damage. In this case, it’s important to get the car checked out by a professional mechanic to determine the extent of the damage and whether or not the car can be driven.

You are currently sitting at around 28% petrol in your diesel.

https://www.rac.co.uk/drive/advice/know-how/wrong-fuel-recovery/

https://www.theaa.com/breakdown-cover/advice/wrong-fuel-advice Craig.

“Don't believe everything you read on the internet.” ― Abraham Lincoln

www.scotgrc.co.uk
Post #990686 28th Apr 2023 11:32am
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BrickBox



Member Since: 05 Oct 2021
Location: Wales
Posts: 606

Wales 2008 Defender 110 Puma 2.4 USW Zermatt Silver
I’d imagine a TD5 would be absolutely fine after that. Hardy engines. 2008 2.4 110 Utility XS.
Post #990707 28th Apr 2023 12:55pm
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TexasRover



Member Since: 24 Nov 2022
Location: Paris
Posts: 768

France 2002 Defender 110 Td5 DCPU Chawton White
I propose on this forum we start any response with:

"it’s important to get the car checked out by a professional mechanic"

You can't be too careful nowadays...

I would think that too much petrol in your diesel would reduce the lubricating properties which could potentially affect the operation of your injectors and pump. Personally I would drain the mix, not worth it.
Post #990711 28th Apr 2023 1:36pm
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LR90XS2011



Member Since: 05 Apr 2011
Location: bickenhill
Posts: 3602

United Kingdom 2011 Defender 90 Puma 2.4 XS CSW Galway Green
If I could I would drain and replace, alternatively put a good slug of quality 2 stroke oil in to add some lubricity DEFENDER 90 TDCI XS,

I hope everyone is well and your land rovers make you happy
Post #990713 28th Apr 2023 2:00pm
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landy andy



Member Since: 15 Feb 2009
Location: Ware, Herts
Posts: 5408

2006 Defender 110 Td5 USW Zermatt Silver
Just keep adding diesel. The more you add the less % of petrol. Carry a spare fuel filter just in case, and change soon too.
Post #990725 28th Apr 2023 5:26pm
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Fatboy Slim



Member Since: 04 Feb 2008
Location: Bridgend
Posts: 1006

Wales 
Keep topping it off with diesel and it'll be fine Thumbs Up
Post #990727 28th Apr 2023 5:46pm
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Dave T



Member Since: 07 Jun 2013
Location: Glasgow
Posts: 487

United Kingdom 1994 Defender 90 300 Tdi SW Cairns Blue
I’d be draining asap, it’s lack of lubrication in the hp fuel pump and injectors that would be the worry 2015 RRS Autobiography SDV6
1994 Def 90 300tdi
Post #990729 28th Apr 2023 6:01pm
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Dinnu



Member Since: 24 Dec 2019
Location: Lija
Posts: 3140

Malta 2012 Defender 90 Puma 2.2 CSW Santorini Black
The injector on a Td5 is the pump as well, with only reciprocating movememt. Was it any other engine, Landrover or Ford, with a rotary injection /HP pressure pump, lubrication could be an issue, although I doubt with a dilution of 23%. 1988 90 Hard Top, 19J Diesel Turbo, Shire Blue - Restoration ongoing
2012 90 CSW, 2.2TDCI, Santorini Black
Post #990744 28th Apr 2023 7:44pm
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Mdm



Member Since: 11 Sep 2013
Location: Sunny Lancashire
Posts: 1508

United Kingdom 
Drain and replace before you kill the old girl.
Post #990748 28th Apr 2023 8:34pm
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Muddybigdog



Member Since: 11 Apr 2014
Location: Suffolk
Posts: 989

United Kingdom 2007 Defender 90 Puma 2.4 XS CSW Zambezi Silver
Drain it as much as possible but keep the contaminated fuel, brim it with diesel, but thereafter add a small amount of the contaminated fuel to each new tank full. Saves wasting fuel, plus many an old HGV driver will tell you about adding petrol to diesel to help stop diesel waxing during cold winters back in the day Jumped ship to reliability - Mitsubishi L200
Puma 90 XS - Sold
D3 - 2.7 S x2 (both Sold)
Freelander 2 HSE - Sold
Freelander 1 - Sold
Disco 2 - Sold
Post #990752 28th Apr 2023 9:12pm
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landy andy



Member Since: 15 Feb 2009
Location: Ware, Herts
Posts: 5408

2006 Defender 110 Td5 USW Zermatt Silver
Re: unleaded into diesel
mustafasoleiman wrote:
Spoiled by my wife's electric Mini


Don’t understand this bit. Spoiled?? Mini?? Electric?? Wash your mouth out. You can use super unleaded, or diesel for this.
Post #990771 29th Apr 2023 6:45am
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Birdy



Member Since: 07 Oct 2011
Location: Côte d'Azur
Posts: 848

France 2011 Defender 110 Puma 2.4 XS CSW Santorini Black
"...many an old HGV driver will tell you about adding petrol to diesel to help stop diesel waxing during cold winters back in the day"

BIG difference between "back in the day" engines and today's direct injection. My boat was filled with diesel which came from a supply so water-contaminated that its Volvo (Perkins-based) engine simply died. Flushed through, filters changed, absolutely fine. A more modern-designed engine would at least have needed a strip-down, and nobody intentionally adds petrol to diesel.

In the OP's situation I personally wouldn't worry too much. The engine's running fine, and every diesel top-up - I would use "Super" diesel though - brings the mixture back to normal.

Peter
Post #990773 29th Apr 2023 7:17am
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Siwynne



Member Since: 04 Nov 2016
Location: West lancs
Posts: 552

England 
Mrs did this to our two week old disco 4. But put significantly more than that in. Topped it up and drove it. Kept it for another three years. Don’t know where it is now or if injectors or pump failed after that
Post #990788 29th Apr 2023 9:24am
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geobloke



Member Since: 06 Nov 2012
Location: Nottinghamshire
Posts: 4350

United Kingdom 
If I were in your position and I was going down the keep topping up with diesel to dilute route (I wouldn't let the tank get below 3/4s for a few weeks) I would also throw in some two stroke oil to protect the pump fuel system and injectors.
Post #990790 29th Apr 2023 9:42am
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