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Alex1976

Member Since: 23 Jan 2013
Location: Buckingham
Posts: 596

Two Stroke in Diesel problems

Recently, for the last few months, I have been having some problems starting the Defender. It was very slow to turn over, and the colder the weather the harder it was to start, even with glow plugs on. It would finally start after a few attempts and then run normally. It would restart fine while warm, but if the engine cooled down fully then it was back to difficult starting.

I was convinced it was a duff battery, strarter or poor earth. Went through all the electrical checks and nothing improved. I was stumped and could not work out why I had these issues.

I have been using two stroke mixed in with each tank of diesel, on a ratio of 1:200 and have enjoyed the improved smoothness and quieter engine this has provided, however I ran out of two stroke and have been running on Shell V Power for the last 3 tanks.

Now it may just be a big coincidence, but in the last couple of weeks with no two stroke my starting issue has disappeared and I now get instant starting even on a cold morning with no glow plugs.

Is it conceivable that the two stroke was causing the diesel to thicken sufficiently that it was causing the engine to turn over slowly and be difficult to start? In a way I hope it is as that means I have found the issue and cured it. I have not heard of anyone else encountering these problems, but I know there is a school of thought that says additives such as two stroke should not be used and just stick to good quality diesel.

I did come across an internet article that claims that two stroke is not good for your engine as it has high levels of zinc and this clogs the injectors over time.

Just putting it out there.....

17th Dec 2017 6:50pm

GREENI

Member Since: 22 Aug 2010
Location: staffs
Posts: 10383

2-stroke....

It's another forum lead myth..... (Like Pumas are better than td5's)

Hahahaha

17th Dec 2017 7:02pm

custom90

Member Since: 21 Jan 2010
Location: South West, England.
Posts: 20662

Well personally I'd never use it, use a proper additive such as Millers.
In-fact that maybe you best bet, from now onwards to clean everything up. TheThunder Rolls🇬🇧🇺🇸
⛽️🛢️⚙️🧰💪

17th Dec 2017 7:10pm

ian series 1

Member Since: 17 Nov 2014
Location: south
Posts: 3127

2008 Defender 90 Puma 2.4 CSW Bonatti Grey

Have to agree!
what is the point in petrol company's refining quality diesel, car manufacturers developing precision Diesel engines,
If your going to whack a load of two stroke oil through it?

Quote....

The results of a study that the practice of dosing diesel with 2-stroke oil is surprisingly ineffective in terms of lubricity and cetane improvements. Engine performance, fuel consumption and emissions were also unchanged, however the use of 2-stroke oil in diesel is potentially harmful to modern diesel injection equipment. Trace amounts of zinc, an element which is found in most 2-stroke oils, are well known to cause injector nozzle fouling and the study measured high levels of injector fouling when the test engine was running on diesel dosed with 2-stroke oil. While the oil industry may not mind the additional revenue from the sale of 2-stroke oil with each tank of diesel, this study demonstrated that it is not in the best interest of the user to do so.

I know there will always be a debate about this, and many on here swear by it,
Personally I wouldn't bother...

80" 80" 86" 88" 90"

Wanted, Forward Control Anything considered.

17th Dec 2017 7:13pm

flydive

Member Since: 27 Aug 2015
Location: Lugano
Posts: 290

2015 Defender 90 Puma 2.2 Heritage Edition SW Grasmere Green

I do not see how 2 stroke oil would make the engine turn over slowly

17th Dec 2017 7:20pm

Alex1976

Member Since: 23 Jan 2013
Location: Buckingham
Posts: 596

Until recent events I was certainly convinced that it was beneficial to use 2 stroke as the engine felt smoother, however I am thinking I will not put anymore in again and just use premium diesel.

17th Dec 2017 7:21pm

Alex1976

Member Since: 23 Jan 2013
Location: Buckingham
Posts: 596

Fly drive - the only thing I could think of was that the diesel was ‘waxing’ with the 2 stroke added in the cold weather and making it difficult to turn the FIP due to pressure, hence making the engine hard to turn over. That’s my laymans diagnosis any way. Someone who knows what they are talking about may have a better theory.

17th Dec 2017 7:24pm

zsd-puma

Member Since: 09 Aug 2016
Location: Kent
Posts: 2720

2010 Defender 110 Puma 2.4 USW Santorini Black

2-stroke might make it less willing to start, but i expect being slow to turn over was just because it was cold. Even with a new fully charged battery an engine will be more sluggish to turn over in freezing conditions than when it's warm.

I just use premium diesel, and not mess about with additives.

17th Dec 2017 7:37pm

dgardel

Member Since: 30 Nov 2008
Location: Veneto (Heart & Head)
Posts: 3586

flydive wrote:
I do not see how 2 stroke oil would make the engine turn over slowly

The only post with a correct deduction

I always use the 2SO also at -20 ° C with Arctic Premium diesel and I have covered 120.000km without any problem, indeed .... Discovery 5 td6 HSE Stornoway Gray Outback Engineering Limited Edition

IID Pro MV License

17th Dec 2017 9:21pm

LR90XS2011

Member Since: 05 Apr 2011
Location: bickenhill
Posts: 3660

2011 Defender 90 Puma 2.4 XS CSW Galway Green

use 2 stroke in my BM from new never had an issue 101000 miles running sweet DEFENDER 90 TDCI XS,

I hope everyone is well and your land rovers make you happy

17th Dec 2017 9:24pm

Alex1976

Member Since: 23 Jan 2013
Location: Buckingham
Posts: 596

may be my diagnosis was just a coincidence and the starting problem will return. I just thought it was too great a coincidence that the two happened together.

17th Dec 2017 9:44pm

Zed

Member Since: 07 Oct 2017
Location: In the woods
Posts: 3351

2010 Defender 110 Puma 2.4 XS CSW Santorini Black

ian series 1 wrote:
Have to agree!
what is the point in petrol company's refining quality diesel, car manufacturers developing precision Diesel engines,
If your going to whack a load of two stroke oil through it?

17th Dec 2017 9:49pm

ericvv

Member Since: 02 Jun 2011
Location: Near the Jet d'Eau
Posts: 5816

2009 Defender 110 Puma 2.4 SVX Station Wagon Santorini Black

Many years ago, after reading on here about the so called benefits of 2SO, I asked the tecchies at my dealer about possible benefits of 2SO additives. They just started rolling their eyes and shaking their heads, asking me what I thought the benefits can be of adding a lubricating oil meant for mopeds running on gasoline.
So I'm permanently using BP Ultimate diesel for at least 8 or 9 years now, which here in Switzerland comes with zero % biodiesel content, an additional benefit. Seems to have all the additives a modern diesel engine and fuel tank can dream of. Distinctly better engine noise than the french supermarket diesels I used in my very early Defender days. My experience is that BP Ultimate is just what the doctor ordered.

Eric

Click image to enlarge You never actually own a Defender. You merely look after it for the next generation.
http://youtu.be/yVRlSsJwD0o
https://youtu.be/vmPr3oTHndg
https://www.youtube.com/watch?v=_GtzTT9Pdl0
https://www.youtube.com/watch?v=ABqKPz28e6A
https://www.youtube.com/watch?v=rLZ49Jce_n0
https://www.youtube.com/watch?v=XvAsz_ilQYU
https://www.youtube.com/watch?v=K8tMHiX9lSw
https://m.youtube.com/watch?v=dxwjPuHIV7I
https://vimeo.com/201482507
https://www.youtube.com/watch?v=ZSixqL0iyHw

18th Dec 2017 4:12am

AJC

Member Since: 30 Nov 2015
Location: Lancashire
Posts: 1368

2 years of 2 stroke in my TD5, Mondeo St TDci and D4 and 0 issues.

18th Dec 2017 5:33am

williamthedog

Member Since: 29 Dec 2012
Location: south wales
Posts: 3441

This is going to be one of these threads again

18th Dec 2017 6:42am

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