On Sun, 18 Aug 2013 03:20:20 -0400, Stormin Mormon
wrote:

I've heard of at least a few engines that have been damaged by the
ethanol content.

What's the mechanism?

The original hit on gasohol was that it attacked rubber parts in the
fuel system. Not the engine itself, but fuel lines, pumps, gaskets.

The car makers changed composition ten or twenty years ago so that's
not a problem with anything but a vintage car.

What's the new problem?