ohh Im back, my pills from the other night wore off dont know what I wrote myself???
its not the surface tension its the max total advance available and cooling effect of the solvent.
gas has pretty low surface tension already.
go with Xylene even better carbon chain
any ane or ene is a hydrocarbon diretive and adds . they distill all this stuff off when making the gas then add it afterward to boost .
PS did I tell ya about my 80% acetone burnouts the other night street still looks cool