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cornish rattler



Member Since: 31 Aug 2013
Location: Manchester
Posts: 642

United Kingdom 1988 Defender 90 200 Tdi CSW Bronze Green
Petrol in Diesel
Hi guys

Yesterday i got talking to a waggon driver at work who owns a 300tdi disco and swears of putting a gallon of petrol in his tank for long journeys would it be ok for me to do the same in my defender 200tdi as i am going to billing next month and was thinking of doing it, what do you think Smile Graham

1988 Defender 90 county 200tdi ( Beast )

Paul Walker 1973-2013
( I Almost Had You )


Last edited by cornish rattler on 2nd Jul 2014 12:43am. Edited 1 time in total
Post #341735 30th Jun 2014 8:00am
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roel



Member Since: 08 Aug 2009
Location: Lelystad
Posts: 2039

Netherlands 2003 Defender 90 Td5 PU Caledonian Blue
I think I would put more than a gallon of diesel in the tank. Whistle Roel

1984 90 2.5 na Diesel - RR V8 (1994-2001)
1997 Camel Trophy Discovery 300TDI (2001-2009)
2005 G4 Discovery III 4.4 V8 (2008-2018) It's gone but it still hurts.
2003 90 Td5 (2009-now)
Post #341739 30th Jun 2014 8:19am
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pob1968



Member Since: 20 Apr 2014
Location: uk
Posts: 239

Do you mean put a gallon of petrol in your tdi?
Petrol and diesel engines operate quite differently - compression ignition - diesels as in they compress the fuel air mix until it explodes rather than a petrol engine that ignites the fuel air mix with a spark plug. With trhis in mind I would be careful mixing the two. 110 Hardtop
Post #341753 30th Jun 2014 9:34am
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Lou Sparts



Member Since: 15 Apr 2012
Location: Kent
Posts: 1501

United Kingdom 2005 Defender 90 Td5 XS CSW Zambezi Silver
It used to be common to add petrol to diesel to prevent the diesel waxing in the winter but that was before winter grade diesel and modern Diesel engines, not sure I would want to add anything that would reduce the lubricity of the diesel as this is what stops your injection pump turning to swarfe.

Just my opinion of course. 2005 Td5 90 XS

Steve
Post #341755 30th Jun 2014 10:02am
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munch90



Member Since: 26 Oct 2013
Location: guildford
Posts: 3558

England 
Re: Petrol in Diesel
cornish rattler wrote:
Hi guys

Yesterday i got talking to a waggon driver at work who owns a 300tdi disco and swears of putting a gallon of diesel in his tank for long journeys would it be ok for me to do the same in my defender 200tdi as i am going to billing next month and was thinking of doing it, what do you think Smile


have you searched on forum about 2 stroke oil in diesel
Post #341761 30th Jun 2014 10:15am
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pob1968



Member Since: 20 Apr 2014
Location: uk
Posts: 239

Yes and modern injectors work at such small tolerances and at such high pressures you have to be careful what you put in. 110 Hardtop
Post #341770 30th Jun 2014 11:00am
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GUM97



Member Since: 05 Feb 2012
Location: Cheshire
Posts: 3555

United Kingdom 1997 Defender 90 300 Tdi HT Stornoway Grey
The look on a customer's face when I handed him a bill for just shy of £3,000 as a result of putting some petrol in a Diesel "because he though it'd be alright" suggests that it's not such a good idea. Don't do it. 2 stroke is a different story though... An engine to TDi for!
"Land Rover- Proudly turning drivers into mechanics since 1948"
Post #341783 30th Jun 2014 11:47am
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gilarion



Member Since: 05 Dec 2013
Location: Wales
Posts: 5084

Wales 2007 Defender 90 Other CSW Trident Green
add a shot of Millers ECOMAX to your tank.

■Up to 7% improvement in fuel economy
■Improves engine response and power delivery
■Cleans injectors and fuel system – ensuring optimum performance
■More complete combustion – reducing soot, and NOx emissions
■Cost effective
■Easy to use
Post #341807 30th Jun 2014 1:54pm
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X4SKP



Member Since: 29 Nov 2013
Location: Berkshire
Posts: 2289

United Kingdom 2010 Defender 90 Puma 2.4 SW Stornoway Grey
Hi cornish rattler

If you're asking what I think you're asking...
a small amount of petrol, in a tank otherwise full of diesel NO...DON'T DO IT Thud

A good 'additive' to a tank of Diesel (the benefits are however debatable) but Thumbs Up
A spare can of Diesel for long journeys Thumbs Up
A long range tank Thumbs Up
A properly maintained Defender Thumbs Up

But avoid the Green Nozzle at filling stations Big Cry SKIP
https://www.defender2.net/forum/topic83242.html
Post #341844 30th Jun 2014 4:45pm
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shaggydog



Member Since: 12 Aug 2012
Location: Kent
Posts: 3346

United Kingdom 1991 Defender 110 200 Tdi USW Arles Blue
As above really, don't do it.

Petrol and diesel systems are very different, petrol can cause the seals and rubbers to swell or leak in diesel systems, as well as cause increased wear on your injectors and pump. This combined with no benefits at all performance wise (can cause pre-ignition too which is very bad for your pistons, cranks, crankshaft, bearings) I cannot see any benefit to it.

Yes if you bought diesel in the Sahara and then drove to Iceland, maybe put a little in to a full tank, otherwise just use diesel.

The Tdi lumps are very forgiving with quality of diesel, they can chew up some pretty cruddy diesel unlike modern common rail lumps. But they don't like petrol.

In my lump I run standard BP Diesel and put in an additive. In my opinion it runs better with the additive though I have no actual figures or numbers to back this up.
Post #341863 30th Jun 2014 6:21pm
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caterham6



Member Since: 18 May 2014
Location: Manchester
Posts: 47

United Kingdom 2010 Defender 90 Puma 2.4 XS CSW Santorini Black
Post #341875 30th Jun 2014 7:26pm
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cornish rattler



Member Since: 31 Aug 2013
Location: Manchester
Posts: 642

United Kingdom 1988 Defender 90 200 Tdi CSW Bronze Green
Ok cheers guys i will leave putting petrol in then but mite look into trying some millers instead, its only i am going to billing in a few weeks time and don't no the con'd of the injectors so thought while i am driving a fair distance i will put something in the fuel system to help clean the injectors wether they need it or not Very Happy Graham

1988 Defender 90 county 200tdi ( Beast )

Paul Walker 1973-2013
( I Almost Had You )
Post #342178 2nd Jul 2014 12:53am
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shaggydog



Member Since: 12 Aug 2012
Location: Kent
Posts: 3346

United Kingdom 1991 Defender 110 200 Tdi USW Arles Blue
To be honest just a full tank of good diesel and some redex should clear through any crud on a nice long run and everything will get nice and warm so hopefully should give it a bit of a boost Smile
Post #342303 2nd Jul 2014 6:31pm
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gilarion



Member Since: 05 Dec 2013
Location: Wales
Posts: 5084

Wales 2007 Defender 90 Other CSW Trident Green
cornish rattler wrote:
Ok cheers guys i will leave putting petrol in then but mite look into trying some millers instead, its only i am going to billing in a few weeks time and don't no the con'd of the injectors so thought while i am driving a fair distance i will put something in the fuel system to help clean the injectors wether they need it or not Very Happy


Try one shot of millers DIESEL INJECTOR CLEANER
they recomend a journey of about two hundred miles on a full tank so Billing should about do that

http://www.millersoils.co.uk/automotive/td...sector=Car
Try Land Ranger Service in Stockport to see if they stock it....
Post #342319 2nd Jul 2014 7:25pm
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cornish rattler



Member Since: 31 Aug 2013
Location: Manchester
Posts: 642

United Kingdom 1988 Defender 90 200 Tdi CSW Bronze Green
Cheers gilarion i will do that as i need to go there on Saturday anyway to see about some welding i need doing so i will pick some up Very Happy Graham

1988 Defender 90 county 200tdi ( Beast )

Paul Walker 1973-2013
( I Almost Had You )
Post #342390 3rd Jul 2014 12:20am
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