Reg there is no need for a propane torch if you run 5% either or one can per gallon of JD starting fluid.

I have been doing a huge amount of flying since my first posting on my Black Brew. I'm loving it! I think I'm going to go out right now.

I still feel that the operating temps in my diesel aren't getting high enough to need the protection of cator oil. The wrist pins of automotive diesels have similar issues exept they DO have pressure lube flowing to them.

As far as the aurgument that commercial fuel suppliers use castor: I say that is just tradition and that there is not alot of science or new inovation going on with diesel fuels. One of the commercial suppliers told me I couldn't use pump diesel..... The commercial suppliers seem like long time hobbiests- not like Chevron or anything. PAW's haven't changed in 40 years. It doesn't seem like there has been much new inovation on fuels in 40 years either.

I have been told that all the old time spark engines ran with 90 wt mineral oil gasoline mixes.

By the way used engine oil has been filterd tens of thousands of times. If it isn't clean enough for a model airplane then you should have drained it out of your car a long time earlier!