Fuel *was* low. I filled up the very next day. Jim you probably nailed it -- I didn't think about that -- I have had this happen before, probably the exact same set of circumstances (go there often enough, typically don't sto to fillup until the trip odometer reaches 220 or 230 (bad mileage probably = city driving + the 1151 02, need to replace that -- wonder if I should get both?))
DF