It would vary by the weight of the vehicle. Probably anywhere from 6-8 in a heavy duty truck to 20 or more in a light car.
pooop
bad MPG 8 city 10 or 11 highway
If it has a 305 around 15mpg If it has a 350 13-14
12 mpg
8-16 mpg
a 3/4 ton Chevy pickup with a 350 gets 15mpgs, at best, 8-10 worst
Averaging about 16 MPG.
What motor size? 350 is around 10-15 Highway.
14.5 City. 17.5 highway.
It depends what it has under the hood with these older trucks and such there to hard to tell i have a 1976 chevy stepside and i prolly get somthing like 8mpg with a 350 bored out and 650 double pumper carb.
18
mine has the original 350 in it and i get roughly 12-15 city and 8-10 highway