I had an '82 240D with meticulous records. Hwy was 29-34. I averaged 32 at 60 mph.

'84 300D same conditions= 29 mpg hwy. About 10% better on the 240D.

__________________
1984 300Sd 210k

Former cars:
1984 300D 445k (!!) (Strider) Original (and not rebuilt) engine and transmission. Currently running on V80 ( 80% vegetable oil, 20% petroleum products). Actually not, taking a WVO break.
1993 300d 2.5 275k. Current 120/day commuter
1981 300SD 188k (Hans) Killed by a deer