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Got link? I've been researching it and I cannot find anything to support that statement, but a lot to say otherwise. The study I linked was done using JASO standard two stroke oil, which is a more stringent standard than TCW3. On that point, I found this interesting.

A little knowledge is a dangerous thing.

It's a free service!

Have you modified the muffler on that hole saw, Rick? Skip tooth or full comp on the cutters? :mrgreen:

It's noise. If you don't know what other things are changing, you can't draw any valid conclusion about the results you get. You don't know what else might have caused the effect you are seeing.

Bingo. If you don't control the variables, you don't get data, you get noise. There's no way to control the variables, so there's no way to get anything but noise. The good news is, there's one thing even worse than noise: Thinking that noise is data. That mistake is all over the Internet.

I did some quick checking. Looks like Rotella still has good zinc content. This guy got the numbers directly from Rotella: http://www.hotrodders.com/forum/shell-rotella-t-162437.html

Probably an honest study, then.

Rotella has plenty of zinc in it.

Hmmm. I'm not sure why you'd want to increase the octane rating on diesel fuel....

Another person who didn't even read the study. Adding two stroke oil REDUCED the lubricity. That's what the scar test measures - damage to the wearing parts.

That's what the tests show. And that's not the only such test that shows the same thing. I'm guessing you didn't read the article, because that was specifically addressed. The sulfer is not a lubricant. The process of removing the sulfur compounds also removes lubricity. Putting sulfur...

Well, well, well, the things you stumble across on the Internet! Fuel for the debate fire! Or, useful information, depending on your viewpoint. I was looking for information on the use of common mineral oil to improve the lubricity of diesel, and didn't find any useful information. But I...