The PA-32-260 engine variant (E4B5 or whatever) is in Petersen's list as
one of the 91
octane engines. However, the airframe isn't approved.

That sucks. Guess I'll never buy a Six.

How does an airframe difference matter to what fuel the engine uses?
--
Jay Honeck
Iowa City, IA
Pathfinder N56993
www.AlexisParkInn.com
"Your Aviation Destination"