bigJake
Well-Known Member
'97 GSX 787 manual says to use only ethylene glycol antifreeze for aluminum engines. Is there a reason not to use the nontoxic propylene glycol. It says on the bottle it can be used in aluminum engines. I wasn't sure if there have just been advances in propylene glycol and the manual is now outdated or if there is a real reason i MUST use ethylene glycol.