WHen I get up around 80mph in my car I can actually watch the fuel gauge move. Not to mention my rpms are pretty high. I haven't went below 1/4 tank yet but only able to get 12 gallons appr. in my tank to fill back up.
I`m getting about 14 mpg at 70...a "little less" at 80-90 LOL..9 around town....but they are SMG = Smiles per gallon!