[TELVM]

Originally Posted by Clev

Car and Driver did a trip across Montana about a decade ago, in a Camaro Z-28 (1994, I believe.) With the 6th speed, they did 100 mph almost non-stop across the state, and averaged about 26 mpg.

The fuel computer onboard my '91 Opel Calibra 2.0i 8V consistently displays 7.5 L/100 (31.4 mpg) at sustained speeds of 150 kmh (94 mph) on level ground, in 5th gear at 4260 rpm.

With a 6th gear and lower revs it could well do under 7.0 L/100 (over 33.6 mpg) at that speed.