Just bought 18.476 gallons this morning and the trip meter said 367.6 miles, so that works out to just under 20mpg. Probably about 3/4 of those miles were highway. It usually gets somewhere between 19 and 21.

1986 Isuzu Trooper, 2.3l, 119k miles when acquired 3/1996, 231k at time of death 9/21/03.
1995 Jeep Cherokee Sport 2-door 4x4, 4.0l, 5-speed, 85k miles when acquired 11/2003, 138k now.