The gas has been sitting to long and gotten a little rusty?

Stop it, your killing me... :-)

I haven't noticed any difference in smell of my hanger since changing from 100LL to 87 auto fuel.  I'm also pretty skeptical about having any significant loss of power after storing fuel in the tank for 30 days.  I'd certainly drain it all tomorrow if I thought it would help.

Rusty (the name, not the adjective)