I believe that it is somewhere around 16city 27highway for the manual transmission.
I own a 1978 280Z and get 6 to 8 MPG, of course maybe the 383ci 465HP v8 might be the reason........
Per the 1976 Datsun brochure (280Z and 280Z 2+2):Federal emissions:16 city, 27 hwy (manual) 17 city, 22 hwy (auto)California emissions:17 city, 25 hwy (manual) 17 city, 22 hwy (auto)
Usually around 25 or 26 mpg. I have a 82 280 zx and on my best weeks i would get around 26 mpg . I drive 115 miles round trip all highway miles every day and dont get much better.
It depends on the size of the motor!! 231ci to 403ci..............
50 mpg for diesel
I own a 1979 GS 550L and regularly get 45 MPG, sometimes a bit more.
15 mpg
12 mpg
19 mpg city and 28 mpg hyway
35 MPG
about 10 mpg