I use the 10% ethanol stuff in everything I own with exception of two cycle engines. I have had no problems with it. In fact, if I use straight gasoline in my 261 it will ping unless I back the timing off or take it easy. I get 20 mpg on the highway so I am satisfied.

Remember 9-11-01--God Bless the USA
JUSTICE, not REVENGE, will prevail

1951 Chevy 1/2-ton Pickup truck