I get nearly the same miles per tank on my 2000 V6 as my old 97 Zetec, about 280-320. Driving in Chicago area, I had to floor the 4 banger to keep up.

2000 SE fleet, V6, ATX, ABS, no spoiler, T-Green/tan. Built 01/2000 in MO.
Added 12 spoke factory SE rims, K&N. Biggest mod: ESP Plan!