While the Vette weighs less and sets lower that to me is still no reason why a sleek yet smaller RWD V8 powered car got essentially the same mileage as my fat, offroad, 4wd, can drive through anything and tow 7500lb at anytime
(and probably has about a .4 Cd) truck can, which also has a 1L larger motor with more power.
Yep, that was top up the entire way. I put a can of injector cleaner in it and cleared out the mileage for the last short partial tank, it got 23.3 on that tank of just flat beautiful Florida land.

I'll run another can through it to make sure it is clear but that to me is just crazy that it can't hit at least 25 with stop-less driving.