4.3 L engine, aprox 16 to 19 mpg depending on diff gear ratio. 2.2 L engine, aprox 26 to 29 depending on diff gear ratio and standard or automatic transmission.
That will be 630 miles to a tank full of gas / 42 gallons.
The 1999 Chevrolet Lumina gets 17 miles per gallon in the city, and 26 miles per gallon on the highway. It has a V6 engine.
30+ miles per gallon
Mine gets about 13 miles to the gallon.
28 on the highway 21
16 -23 mpg
The 1999 Ford Expedition gets about 16 miles per gallon at its very best. On average this vehicle gets 12 miles per gallon in city traffic.
15-17mpg
13 mpg
16 city and 23 Highway.
I have a 99 cav and it get 28 1/2 miles to the gallon
My 1999 Royal Star Venture gets an average of 45 miles per gallon.