Adding 2-stroke oil to diesel

Little Five said:
There has been no mention of the effect of adding 2 stroke oil to diesel with regard to the longevity of the engine/and or the parts which should benefit from the addition. Is the debatable advantage only re fuel economy?
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I started using tw3 outboard oil after reading about its advantages, mainly ease of starting and quieter at starting. No idea about economy and don't really care. Volvo 7a uses very little fuel anyway and burns no oil that I notice. My boat is used all year round and at least once a week. It starts easy and I could not state there is a noticeable improvement but my annual fuel bill last year was less than 20 litres so the tw3 oil used was very little from the stash used for my outboard.
I also ensure I use real diesel with out the ethanol added.
 
fishermantwo said:
I started using tw3 outboard oil after reading about its advantages, mainly ease of starting and quieter at starting......... It starts easy and I could not state there is a noticeable improvement
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£1.20 a litre for diesel. £8 a litre for snake oil. No proof that modern diesel is harmful.
So 100 litres will cost an extra £30 when dosed. :eek:

So.... is that a reason to fanny about then?

Still. Suit yourselves. It's your money.
 
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Lakesailor said:
£1.20 a litre for diesel. £8 a litre for snake oil. No proof that modern diesel is harmful.
So 100 litres will cost an extra £30 when dosed. :eek:

So.... is that a reason to fanny about then?

Still. Suit yourselves. It's your money.
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Obviously our snake oil is much cheaper. We also use a different form of mathematics! The tw3 is added at .5%
 
olive oil ?

I read a thread on this 2 years back and decided to try adding 2 stroke to my engines .
After it was introduced I found the starting up was more instant , but the biggest change was in the reduced noise from the engines when running , it was surprising and very welcome !
As most posts state , the 2 stroke oil is now quite expensive , so I experimented with a local oil (olive) and had the same results !
I now add this to every tank of diesel .
 
grafozz said:
I read a thread on this 2 years back and decided to try adding 2 stroke to my engines .
After it was introduced I found the starting up was more instant , but the biggest change was in the reduced noise from the engines when running , it was surprising and very welcome !
As most posts state , the 2 stroke oil is now quite expensive , so I experimented with a local oil (olive) and had the same results !
I now add this to every tank of diesel .
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Olive oil would be similar to Bio diesel. Few years ago now I was running Bio in my fishing vessel with a Gardner main. The fuel was bright yellow and very slippery to feel. The pensioners on the wharf used to complain when I started up or returned that it smelled like fish and chips. The Gardner loved it. Unfortunately the government taxed it out of business and we are left locally with only road diesel, either straight or with ethanol added.
 
grafozz said:
I read a thread on this 2 years back and decided to try adding 2 stroke to my engines .
After it was introduced I found the starting up was more instant , but the biggest change was in the reduced noise from the engines when running , it was surprising and very welcome !
As most posts state , the 2 stroke oil is now quite expensive , so I experimented with a local oil (olive) and had the same results !
I now add this to every tank of diesel .
Click to expand...

What ratio of oil to diesel do you use?
 
I have been using it for a while now. For me it's the noise reduction. The difference is amazing. Mind you my engine is very noisy in the first place. I would expect it to make less difference to a modern more quiet engine. As for the science behind it I can only guess that maybe it makes the diesel burn slower. Also the tick over is smooth from cold and lower when warm. I can't see that it would be doing any harm, which is why I tried it in the first place. It is meant to be burnt with a low ash residue and must provide some measure of increased upper cylinder lubrication. Pump lubrication is not an issue for me, I have an inline pump lubricated by an oil feed from the engine. The mix I use is 300:1. I think you have to experiment to find a ratio that's suitable to your engine. I buy the 600ml bottles from Wilkinsons for £2.60 works out about 1.8 ltr for the average 1 ltr in the garage.
 
Just come to this.

I followed a few similar threads a while back and ecised "why not" after some scote stole my tender thus "gifting" me with half a bottle of 2T oil. I added about 100ml to my tankage and left it for 30 minutes or so to disperse (probably not needed).

I have two aged, loved, and in need of more overhaul than my skill and wallet will allow, HT6354s. For them as doesn't know (whadday mean what are they, this is the PBO forum!) 5.9 litres x 2 of old design diesels, one of which smokes something awful, grey clag like a Duchess giving it some up Shap. And that was after having the injectors done, a process that resulted in 6 new nozzles. After the 2T, still smoke, but substantialy less smoke, certainly not sufficient to asphyxiate any unfortunate behind me. Given that the recommended possible cure was a rebuild of the injector pump (>£500 quoted) and/or head off and who knows where that might lead in terms of £££ I feel the 2T was worth it.

Any old two stroke is viable, it need not be fancy marine grade. Old Land Rover enthusiasts seem fond of it too. It worked for me running big lazy engines on the Thames.
 
oldvarnish said:
I'm still not clear - what is the recommended dosage of two stroke oil to diesel?
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I am not sure if the word "recommended " is appropriate in this case as engine manufacturers would say that their engines are designed for such and such grade of fuel which of course does not include the addition of a 2T lubricant. Having read several blogs on this subject, in this forum, I decided to try it on my 1990 built Perkins at a 200:1 mix ratio. There was a noticeable "smoothness" in the engine running but I don't think it made any difference in the fuel consumption. I have run the engine with this mixture for about 100 hours without any problems whatsoever. If anything, it cured the occassional smoking caused by the odd sticking injector. I am not however sure if the 2T will leave any residues in the tank ( same as found in the 2T engine carburators) if left in the tank over a long period, say at lay up. So as precaution I topped up my tank before laying up with the usual Low Sulphur Diesel but I did not add the 2 stroke oil in my last fill. I would certainly continue to use 2T over the next season.
 
Now let's see if I have this right, all I need to do when I fill up next is:-

Add 0.5% of some magic oil to the fuel.

Add 3.00 % acetone because it reduces the surface tension so improves the burn, thus better performance and economy.

Add a few moth balls because they prevent 'the bug'.

Add some Methylated Spirits because it mixes with water and will ensure I never get the bug or a rusty tank.

Did I miss anything?

Good luck. :)
 
oldsaltoz said:
Now let's see if I have this right, all I need to do when I fill up next is:-

Add 0.5% of some magic oil to the fuel.

Add 3.00 % acetone because it reduces the surface tension so improves the burn, thus better performance and economy.

Add a few moth balls because they prevent 'the bug'.

Add some Methylated Spirits because it mixes with water and will ensure I never get the bug or a rusty tank.

Did I miss anything?

Good luck. :)
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Add a bit of water to make sure all the additives have something to do.
 
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