Thread: How much 2stroke oil to add?

Originally Posted by isuzurover

Sorry, but you are wrong. This is another myth perpetuated by many people. If you go back a page or 2 and read the journal paper abstract I posted it explains the truth: Lubricity of diesel was found to be adversely affected by the methods used to remove sulphur. However sulphur itself is not a lubricant in diesel.

All along I was under the impression that sulphur was the lubricant in diesel. There are a lot of motoring journalist who have got that wrong.

Originally Posted by wayne

All along I was under the impression that sulphur was the lubricant in diesel. There are a lot of motoring journalist who have got that wrong.

Motoring journos get most things wrong

I reckon that this has all been said and done before.

Somehow, I can't see Denise and Alex ever knowing the difference, somehow, I can't see this thread going anywhere that similar threads haven't gone before.

What do you reckon?????

Cheers,

Jason

Originally Posted by wayne

All along I was under the impression that sulphur was the lubricant in diesel. There are a lot of motoring journalist who have got that wrong.

Technically, no sulphur is not a lubricant, however it is absorbed by any alloy parts that contain parts that contain nickel to make an eutectic alloy that can increase lubricity.

With the advent of ULSD in the early millenium the sulphur is now removed to less than 10 ppm and the eutectic method of lubrication became non existant. At this point the refinery then had an obligation to put in a lubricity additve in on the rundown line to tankage, which is still done to this day.

How do I know the above? I work for a Major Oil Refiner in the U.K. as an Instrument / Analyser technician. I work day in day out with the equipment that monitors and controls the sulphur content and the lubricity additive.

I must admit I have never heared of putting in 2 stroke oil with the diesel and it's a bit pointless in countries where the diesel processed to ASTM standards. Perhaps in countries where the diesel is basically distilled camel's urine it may be of a very small benefit.

Would you mind telling us what the additive is.

We know it by it's in house branded name of D27, however the chemical composition from the MSDS is:

LIGHT AROMATIC SOLVENT NAPHTHA (PETROLEUM) 30.0%
TRIMETHYLBENZENE < 30.0 %
BUTOXYETHANOL 15.0 - 30.0 %
XYLENE < 5.0 %
TRIMETHYLBENZENE < 2.0 %
ETHYLBENZENE < 0.5 % 100

Originally Posted by PsiDOC

We know it by it's in house branded name of D27, however the chemical composition from the MSDS is:

LIGHT AROMATIC SOLVENT NAPHTHA (PETROLEUM) 30.0%
TRIMETHYLBENZENE < 30.0 %
BUTOXYETHANOL 15.0 - 30.0 %
XYLENE < 5.0 %
TRIMETHYLBENZENE < 2.0 %
ETHYLBENZENE < 0.5 % 100

For the most part, this has been an interesting read. So it would appear from the above post that the additive to diesel fuel for lubrication is mostly Petrol and lighter volatiles? Interesting.
I too, have been guilty of running a work ute on nearly 50/50 petrol/diesel for a while, with no ill effects. I believe they go BANG if it's 100% wrong in the flammables favour, but not done that experiment.
On a related issue, ever since suffering water in the carby due to condensation in the fuel tank, and no maintenance or pre-checks on my part 35 years ago, I was stranded at sea in a 15' open boat. Luckily the wind blew me mostly back on shore, but it ruined my day, and taught me a lesson.
Since then, every petrol motor I've owned, from chainsaws to LS1 V8's have been given a regular dose, albeit small, of metho mixed with two stroke oil. The former to bond with the water that invariably finds it's way into the tank, and drag it through the fuel cycle rather than just block up the works. The latter to lubricate the top end of the motor. I've not had a fuel related, or burnt valve, engine problem since. Don't know about diesel, re water in the mix, as I've relied on separators with the CAV type filter, but am open to ideas. I usually add a commercial fuel conditioner to my diesel, to kill off the bacteria, if nothing else.
As someone has said, if it makes you feel good, or your convinced that your engine likes it; who's to argue? My petrol motors have always thanked me for a little bit of a brew every other tankful.