On Fri, 14 Nov 2008 23:33:44 -0600, Dave S
wrote:

rich wrote:
right now, avgas is running $2 more a gallon than premium car gas. And
from what I've read, premium auto gas doesn't contain ethonol.

Ethanol content may exist in premium autofuels. There is no systematic
guarantee because you buy "hi test" or "super unleaded"

Ethanol was used to replace MTBE as an oxygenate in fuels. The
oxygenated fuels are driven by EPA and in some cases, state
environmental regs. In my market, ALL mogas is presumed to contain up to
10% ethanol.

Dave
KEFD
The operative word is "up to"
In the case of Shell Canada, that means 10% in regular.
0% in Premium
Meand 5% in mid grade (blended)