Aasland
Depleted
It would also have to be 5 tanks over the same distance, speed, and wind conditions. I'd probably have to control for brand too, and get from the same places. Sorry, I'm just not motivated enough to change your skepticism.Prove it. Post mileage averages over 5 tanks of each type, then you'll have something. Until then, I remain skeptical.
I'm not disputing that I may be wrong, as my results are entirely subjective (which you've pointed out) - just stating what I perceive.