in my 81 aircooled van, if I run at only 55mph and don't have to do too
much climbing, I'll pull around 20-22 MPG.

That having been said, I live in Northern California with nothing but
climbing to do, so my usual MPG is closer to 17 average.

The PO had electronic ignition which may have helped, but im back to the
points setup now for ease of repair when travelling. (the unit was
really old and hard to get setup properly.)