The pink Omega actually uses a blend of synthetic and castor. It actually is the best of both worlds.

Fuel with all castor for the lubricant isn't needed nowadays which is good, because none of the LHSs around here sell any fuel that's all castor lube. So......... that said......... if you hear any bad stories about castor ignore them. You probably won't find a fuel that has all castor lube, and the percentage in the blends with it are only going to give you the good, not the bad.

My pink Omega is easy to clean off. There seems to be just enough castor in it's blend to provide the extra protection that synthetic can't give but castor provides. And there isn't so much that it makes the airplane a sticky mess.

Be glad you don't have to experience what it was like to wipe off a plane that'd been buring Fox Superfuel with it's 29% castor.