Adding 2 oil stroke in diesel fuel

Nostrodamus

Nostrodamus

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Sometime ago there was a thread that mentioned the benefits of adding 2 stroke oil to your diesel fuel.

Now a bit of time has passed I wondered if anyone still does this and has anyone noticed any benefits or has it caused any problems?

How much do you add and how often?

Thanks
 
I would not use it.

Nostrodamus said:
Sometime ago there was a thread that mentioned the benefits of adding 2 stroke oil to your diesel fuel.

Now a bit of time has passed I wondered if anyone still does this and has anyone noticed any benefits or has it caused any problems?

How much do you add and how often?

Thanks
Click to expand...

I started a thread on this and may be the one you are referring to. My engine started to smoke after adding it and ended up with some other problems which resulted in a complete rebuild. I would not use it again.
 
Jcorstorphine said:
I started a thread on this and may be the one you are referring to. My engine started to smoke after adding it and ended up with some other problems which resulted in a complete rebuild. I would not use it again.
Click to expand...

Were the problems down to the 2 stroke do you think and what sort of problems?
 
Twister_Ken said:
Why on earth would you do it? Are you trying to outguess the engine and fuel manufacturers who spend millions researching optimum solutions, which you then think you can 'improve' by adding a shot of gloop?
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Just wondered if it made a difference as in the Mercedes report when they tried it.

The engine manufactures probably were not aware that sulphur would be taken out of fuels when they designed engines commonly found on boats.

Do you add biocide glupe to your engine Twister. No doubt the fuel manufactures thought about this as well?
 
I,ve been doing it for years.Started doing it as I have a steel boat and the fuel tank is steel and thought it would stop fuel tank going rusty.Found engine seem to run better,now we,ve got low sulphur fuel will definately carry on to lubricate pumps etc.Use 1 lt to 200lts fuel approx.cannot see how it would knacker an engine.
 
Twister_Ken said:
Why on earth would you do it? Are you trying to outguess the engine and fuel manufacturers who spend millions researching optimum solutions, which you then think you can 'improve' by adding a shot of gloop?
Click to expand...
I said as much in the previous thread and was told I obviously didn't know anything.

Time is the judge.
 
Nostrodamus said:
Were the problems down to the 2 stroke do you think and what sort of problems?
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Really don’t know but I changed the engine oil from basic mineral oil to Castrol GTX Magnetec diesel at the same time I put in the 2 stroke oil and the engine started to smoke also was tricky to start and started to blow back through the camshaft cover. Ended up discovering that I was loosing compression in no 4 cylinder so ended up with a complete rebuild.

When I stripped the engine I found no mechanical damage to rings etc so could be that running the engine on thinner oil GTX and the 2 stroke cleaned up the gunge on the rings and left me with a smoky leaky engine.

The argument for using in the 2 stroke was compelling and there were lots of reports of injection pumps failing due to low sulphur.

http://www.freel2.com/forum/topic878.html
 
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The only thing I add to my fuel tank (diesel) is a few litres of petrol every now and then. It kills and cleans as it mixes and runs through the tank and engine. No negative results in 40 odd years so far, don't have a modern engine, so don't know if there would be any disadvantage there. I'm a diesel fitter to trade and its something we have always done on diesel engines up to and including years to 1999.
Don't see the point in adding oil to oil based diesel fuel though.
 
ukmctc said:
The only thing I add to my fuel tank (diesel) is a few litres of petrol every now and then. It kills and cleans as it mixes and runs through the tank and engine. No negative results in 40 odd years so far, don't have a modern engine, so don't know if there would be any disadvantage there. I'm a diesel fitter to trade and its something we have always done on diesel engines up to and including years to 1999.
Don't see the point in adding oil to oil based diesel fuel though.
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I used to add petrol to my toyota troop carrier every so often id put a litre in a 100 litre tank, No problems in 10 years of ownership etc?
 
Jcorstorphine said:
Really don’t know but I changed the engine oil from basic mineral oil to Castrol GTX Magnetec diesel at the same time I put in the 2 stroke oil and the engine started to smoke also was tricky to start and started to blow back through the camshaft cover. Ended up discovering that I was loosing compression in no 4 cylinder so ended up with a complete rebuild.

When I stripped the engine I found no mechanical damage to rings etc so could be that running the engine on thinner oil GTX and the 2 stroke cleaned up the gunge on the rings and left me with a smoky leaky engine.

The argument for using in the 2 stroke was compelling and there were lots of reports of injection pumps failing due to low sulphur.

http://www.freel2.com/forum/topic878.html
Click to expand...
Your problems were more likely due to using a synthetic engine oil, which would remove all the old carbon deposits, not a good idea in an older engine. The 2 stroke mixed in diesel will only improve lubricity (?).
 
Jcorstorphine said:
Really don’t know but I changed the engine oil from basic mineral oil to Castrol GTX Magnetec diesel at the same time I put in the 2 stroke oil and the engine started to smoke also was tricky to start and started to blow back through the camshaft cover. Ended up discovering that I was loosing compression in no 4 cylinder so ended up with a complete rebuild.

When I stripped the engine I found no mechanical damage to rings etc so could be that running the engine on thinner oil GTX and the 2 stroke cleaned up the gunge on the rings and left me with a smoky leaky engine.

The argument for using in the 2 stroke was compelling and there were lots of reports of injection pumps failing due to low sulphur.

http://www.freel2.com/forum/topic878.html
Click to expand...

Can you tell us what engine and what hours you had the problem please. I posted here once about our Yanmar that had very light oil in it, and a can of the same stuff in the lazarette. Bringing the boat on a five day delivery trip-all motor bar a few hours- it emptied the sump, used all the spare and more. While it was doing this it smoked and was noisy. I gave it an old fashioned look, checked the manual recomendations and changed the filter and oil. I used an old fashioned 20/50 suitable for petrol and non turbo diesels. It now starts if you look at it, does not smoke and is less noisy. I have never needed to top it up between oil changes either since the change. The previous owner was using oil for the new generation of engines which was far too light for our old generation Yanmar with 2500 plus hours on it. Perhaps the magnatec was too light? Hope this helps.
 
Low sulphur diesel has been in Oz for many years, one thing we all found out was that older diesel pump seals failed, even my old ford trasit had to have the pump overhauled, but no problems after that.

It seems the material used for the seals in the older pumps was compatible with new fuel. So you can expect some problems.

Good luck and fair winds. :)
 
rotrax said:
Can you tell us what engine and what hours you had the problem please. I posted here once about our Yanmar that had very light oil in it, and a can of the same stuff in the lazarette. Bringing the boat on a five day delivery trip-all motor bar a few hours- it emptied the sump, used all the spare and more. While it was doing this it smoked and was noisy. I gave it an old fashioned look, checked the manual recomendations and changed the filter and oil. I used an old fashioned 20/50 suitable for petrol and non turbo diesels. It now starts if you look at it, does not smoke and is less noisy. I have never needed to top it up between oil changes either since the change. The previous owner was using oil for the new generation of engines which was far too light for our old generation Yanmar with 2500 plus hours on it. Perhaps the magnatec was too light? Hope this helps.
Click to expand...

The engine was a Ford XLD 1.6 ( Escort/Fiesta) diesel which had been in a car before I marinised it and as Stork_III said, the new light oil probably cleaned out all the old carbon deposits etc.

I have to say however that I chose the oil by logging onto Halfords website and plugged in the engine type and it came up with Castrol GTX Magnetec.

Cost me £1500 in parts to completely rebuild the engine, might have been better trying your method of putting in some old fashioned straight oil as although there was a bit of ovality in the cylinders it was may have been ok just to put in new rings but I went for a rebore just in case the rings did not bed in.
 
So, going back to the original question.

Is adding some 2 stroke a good or bad idea and is there anyone else who does it?

Interesting that some add petrol to their diesel and the Aussies have been having problems with low sulphur.

Stupid question but can you add sulphur to diesel fuel?
 
The principal reason for adding petrol is that it contains a powerful biocide thus sorting out potential diesel bug. (Lead in original petrol and its replacement in unleaded).
 
Does anybody know what is in gloop like Redex for diesel.
On the bottle it just says "contains Kerosene"
That's just paraffin innit?? That doesn't cost £6 for a small bottle.
 
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