ORIGINAL: Remby
I would really like to see a full Castor based 25% fuel, I do not care for Klotz as I find it flashes off, the piston turns black from the flash burning, I doubt the failure would have happened using all Castor lube.
Remby -
Do you recall which Klotz lubricant you were using. They make a number of different products ranging from pure synthetic to synthetic/castor blends to an all-castor lube. Klotz BeNol is pure degummed castor - pure in that it doesn't have synthetic lubes mixed in, but it does have some additives. Here is a [link=http://www.klotzlube.com/techsheet.asp?ID=2&submit2=View]BeNol tech sheet.[/link]
I use the BeNol to mix with other fuels to bring the castor percentage up and have not noticed any problems, other than oily planes and discoloration on the external parts of the engines.
andrew