>. I called Chevron up in San Francisco and the fellow said it has 8% ethanol >but that probably varies with the season. ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Ethanol will eat up your fiberglass (epoxy) tanks also. For gravity feed systems, make sure you check with engine running max rpm with the tail in as low a position as possible and minimum fuel in the tank. Tail draggers, put the tail in a ditch or other depression and by all means, have the tail tied down. The few inches of head pressure you have on the ground can quickly disappear on climbout. Larry Flesner
