For all the cars I've had that I've calculated averages for:
1986 Mercury Capri 2.3L A/T- 18/city, 25/highway
1988 Ford Mustang 2.3L A/T- 20/city, 28/highway
1998 and 1999 Ford Escort wagons A/T- 26/city, 34/highway
1999 Ford Escort sedan A/T- 28/city, 38/highway
1994 Ford Escort wagon A/T- 24/city, 30/highway
2003 Ford ZX2 5MT- 26/city, 34/highway
2002 Ford Ranger 3.0L A/T 4x4- 16/city, 24/highway
2011 Ford Ranger 2.3L A/T 2WD- 22/city, 30/highway
1997 Subaru Legacy L 2.2L AWD- 18/city, 26/highway