Originally Posted by
JAMMINKRAZY
Odonnell leaves a TON of orange oily residue inside your engine and even in your fuel system. I find it hard to believe that there's no castor in it. I could be wrong though. Either way OD is awesome fuel and not at all detrimental to the longevity of your engine.
I am talking about the black carbon residue on top of the piston......OD is a solid fuel no doubt, but I have lost a few rod bushings on it when I am pushing the limits......But unless your mercilessly over revving your engine its not even relevant... I find fuel high in caster protect better in extreme applications, but there is more carbon deposit left on the piston top...I also find you can run a leaner mixture with a greater resistance to detonation....tuning can be a little trickier on LSN, heavy caster will load up a little quicker making the LSN adjustment more critical.....I fin synthetic based fuels to tune little easier, more forgiving on the LSN...burn cleaner with no deposit, but under extreme conditions we see far more spun rod bushings...