Quote:
Originally Posted by cRiPpLe_rOoStEr
Gotta love the good old Castor oil, at least it's biodegradable  |
It also had a pleasant 'barbeque' smell. One of the early synthetics was glycol based. It made your eyes burn and was probably toxic as well. Though it was probably the best lubricating two stroke premix at the time it had absolutely no rust preventative properties whatsoever. Leave the bike over the winter and the engine was rusted solid by spring.
I think all synthetics are polyol esters now. Not as rust inhibiting as petroleum but certainly better than glycol.