I think the Vette is one of the most fuel efficient sports cars around - you might get 25 mpg when cruising about at 70 mph (of course RC wont know what i mean
)
I think the 4 mpg must be because he was in the hard acceleration mode - i mean the Vette must be in third/fourth gear.
My S4 is pretty fuel efficient on the highway for a heavy piggie:
- 75 mph on cruise control - 26 mpg+ depending on traffic
- 90 mph on cruise - 21.9 mpg
- 120 mph (definitely not on cruise) - 15 mpg (approximate)
Of course I am refering to the US gallon here (3.75 l)