Greg,
As should be clear, two strokes are far different animals than four strokes. Don't confound the two behaviours. Open crankase 4strokes "in principle " NEVER see fuel in the crankase, so nothing to dilute oil arriving in it Two strokes in principle are EXACTLY THE OPPOSITE, in the crankase the combustible cohesists with oil, if it has not evaporated it forms a a mist that can show a severely reduced viscosity relative of straight oil. THIS IS MEANING DILUITION!
Andy,
Don't use two strokes oils for two strokes diesels, , they will destroy your conrods!
I am really tempted from vegetable chain lubes, as I already posted. They should fit well diesel needs, and should mix well with kero since they are soy or canola based, with adequate viscosity improvers and EP additives. Their cost is ridicoulous, and Renewablelube has some good high viscosity ones. Here in Italy I am searching for TOTAL chainlube, a vegetable that appears very similar to the renewablelube high viscosity types. Well worth trying, I guess.
Ugo