ORIGINAL: jessiej
ORIGINAL: jaka
Hi!
The Castor oil we used (got from the AMA )at the 1995 pylon racing world championships at Muncie were leaving a lot of black goo in our engines! Fuel was 80/20 "Riche's Brew"!
I don't think we have inferior Castor oil over here in Europe, as we use Castrol M, castor oil. But the fact is, Castor oil leaves a film (black or brown) inside the engine that is constantly building up during time on piston sides and in the combustion chamber...and this is no good!
Using synthetic oil ...or a combination of synthetics and Castor oil inhibits all this carbon build up.
Regards!
Jan K
Sweden
Jaka, how do you explain the fact that we in the USA do not suffer the alleged problems that seem to plague you when using Castor?
jess
Jess,
It could be the 'varnish' and soot that plagues engines in some places is more a result of the gum...
BeNOL from Klotz is said to be 'degummed' as is Baker's AA Castor oil (and also Morgan CleanCastor).
My experience with BeNOL is that it burns pretty cleanly.
Take a look at this MVVS .49 head. It has nothing 'caked' on it and the varnish is no thicker than anodizing.
It has always been run with 20% oil, including between 50-55% BeNOL Castor and/or Castor oil contained in Model Technics Duraglow fuels and has accumulated over 70 hours of run-time.
In the far past, I have seen 'pharmaceutical' grade Castor oil produce gunk and soot, in amounts that you couldn't even imagine...