Originally Posted by GrassGuerilla
I've heard (no proof) that the ethanol blend is not very precise. One batch of E-10 may be 5% ethanol, another batch may be nearly 20%. Purely heresay, but it does explain the occasional meltdown of plastic/rubber.
This is not heresay. There was an article in ?Landscape Digest? (a Moose River mag) where they were discussing the threat of 15% ethanol. It was in that article where a guy down in the south had been testing ethanol fuel for years - and found wildly erratic percentages (from 5-20%). I'm too lazy to look up the article, but that really struck me when I read it and I've retained it since.