After a Google and Youtube search, I still don't have a clue where to look to find out if my airplane has an STC for auto fuel. I'm looking through the engine log but I can't read most of what is written. Some entries are printed by hand, some in cursive, or as some would say, long hand, and some in chicken scratch and some have been stamped, faded and illegible. I should have asked the mechanic while it was in for the annual but I didn't think about it.
Bob