Adding 2-stroke oil to diesel

Adding 2 stroke oil will provide no benefits and if anything would be likely to give problems - what are your exhaust ports like?
 
It's a very interesting paper, perhaps a degree/PhD thesis? However, his technical findings greatly exceed the requirements of the 4x4 drivers who add two-stroke oil to their fuel. The only basis for doing it that I have seen is that it makes the engine quieter, so must be good.
 
The current thought seems to be that in our lightly loaded and seldom run hard diesels that we use on our boats the best oil is actually a good quality mineral oil, a higher lubricity synthetic not actually providing enough 'wear' on the bore to prevent glazing.

I'd imagine that adding 2 stroke oil would achieve much the same result, with the added downside of your boat smelling like a 50cc moped!
 
The reason for adding 2 stroke oil to modern diesel fuel is to replace the lubricating benefit of sulphur. All road diesel and now more and more red diesel is low sulphur. Not a problem with "modern" engines but with those like my 30 year old Thornycroft added lubrication certainly helps parts like the injector pump and since using 2T oil my engine runs sweeter. Do not however use engine oil as this is not designed to burn and if used will leave a possibly harmful deposit.

P.S. 500:1 or even less concentration is all that is need; and no your exhaust will not smell like a 2 stroke engine.
The above comments of course refer to auxiliary engines in sail boats and smaller low speed motorboats not high speed powerboats.
 
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A few years ago I put 7 litres of petrol in my diesel car, (x-type jaguar). A quick google suggested top it up with diesel, (48l), and add a litre of 2 stroke.

I did this and have had no trouble since. I'll never know whether it made the difference.
 
It would be interesting to see the injector fouling tests run with Miller's and other brands of additive.
Is marine red diesel closer to 'refinery diesel' than forecourt diesel?
In which case, if you really care for the engine, consider using white diesel??
 
[FONT=&quot]- Wynn's Supremium® Diesel is an additive package developed to upgrade the quality of regular diesel fuel to premium-grade diesel fuel.

[/FONT][FONT=&quot]- Wynn's High Performance Diesel System Treatment is a chemical treatment that has a triple action:[/FONT]
[FONT=&quot]1) Increases engine performance[/FONT]
[FONT=&quot]2) Reduces fuel consumption[/FONT]
[FONT=&quot]3) Reduces black smoke

[/FONT][FONT=&quot]- Wynn's Injector Cleaner is a fuel additive for petrol and diesel engines designed to neutralize the negative effects of water in fuel.

+ + +
now add [/FONT]2 stroke oil to the list!
I wonder what is the most cost effective :)
 
I,ve been doing it for years. 1lt to 200lts of diesel. There was a very interesting article by Mercedes giving the benefits of adding 2stroke oil to diesel. Not sure if its still on google.
 
RichardS said:
I can't say that I'm suprised as I've always assumed that if such additives were beneficial on an ongoing basis then the fuel companies would already be adding it and charging you for the privilege. :(

Richard
Click to expand...

Years ago petrol companies would sell to petrol stations fuel additives for sale on the forecourt to add to petrol, Rex-Ex (Esso) and UCL (Upper Cylinder Lubricant) Shell, BP, National Benzole.

And with now with diesel I dont see the problem with "fine tuning" diesel, With paraffin being 28 seconds for a ball bearing to fall down a tube and diesel being 35 seconds, perhaps adding a bit of oil will take it to 36 seconds.
 
Jim@sea said:
Years ago petrol companies would sell to petrol stations fuel additives for sale on the forecourt to add to petrol, Rex-Ex (Esso) and UCL (Upper Cylinder Lubricant) Shell, BP, National Benzole.
Click to expand...

Years ago when I worked in the research centre of a major petrochemicals company a colleague used to test every one of the magic additives that used to be released periodically. These included Redex, Winns, various PTFE based additives like Slick 50 and many more. Not one made the slightest improvement when tested scientifically. From time to time I still see additives that appear to offer major benefits, especially to the four-ball test. These look impressive but when other tests are carried out it is found that the benefits in one are always negated in one or more others.

The famous myth buster is the one in which an additive is mixed with the engine oil, which is then drained and the car run for impressive distances with no oil at all. When Briggs and Stratton investigated the claims scientifically they found that an engine without the additive would do just the same, the difference being that the one with the additive caused far more engine damage.
 
Baddox said:
I have occasionally added 2-stroke oil to my diesel, in the belief that it could help with lubricity and so minimise wear. Now, it looks like at best there is no benefit and at worst it could add deposits to injectors.

http://www.fuelexpert.co.za/2-stroke-oil-in-diesel-technical-study.php
Click to expand...
Would that be marine 2T or the ordinary chainsaw / lawnmower type 2T?
"Proper" hi-sulphur "dino-diesel" should still available from your local fuel depot, I think it is for "agricultural" use.
 
PowerSlapper said:
Would that be marine 2T or the ordinary chainsaw / lawnmower type 2T?
"Proper" hi-sulphur "dino-diesel" should still available from your local fuel depot, I think it is for "agricultural" use.
Click to expand...

2-stroke oil complying to JASO FC/API TC/ISO GD

Your 'proper' diesel would be the 'refinery' stuff that fails all the tests, with or without 2T oil added?
 
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