Originally Posted by Roelof

So it is all of us having the wrong experience compared to yours?

You can provide us with all kind of scientific numbers but the one castor oil isn't the other. Take Shell Racing M, the best performing oil I have seen due itts SAE30 specs but the engine will turn totally black inside. I also have runned Castrol M50 (later named to Racing M as well) and Eurol Racing-1. They seem to be the same with the same results like a pretty clean light brown color.
And sometimes it is not the oil itself causing the black layer but from the polution inside the oil, it is hard to get castor 100% clean. It is the synthetic oil that is made to give a clean combustion for less engine maintenance.

And talking about your flashpoint numbers..... How hot does it become inside the engine? You do not know.... I can only say that our 48.000 rpm and higher compression will give our engines a much higher combustion temperature than your monster truck engine.

Originally Posted by stanleyw808

Hello 1995 Monster T,

Castor Oil flash point is at 229ºC. But as Roelof said that the heat at the combustion point/center surely exceeding 229ºC.

I had the experience of using Runner Time fuel for some time. It has full 9% Castor Lubricating Oil, and the Piston Head comes out brown to black after 60 minutes Final. At the moment I am running VP Tessmann Edition Fuel that run propretiary 7% Full Synthetic Lubricating Oil and the Piston Head is not as brownish as with Runner Time.

Cheers..