Originally Posted by Striker_VII
So I just went on a 40 mile drive after gassing up with Shell V-Power 93 when I was nearly on empty. Due to slight traffic I set cruise control to 55 and left it their for the whole ride. Is this number correct? I know that the focus advertises 40 mpg but I don't know what the testing requirements for that number is. I am sure that driving 55 increased my mpg but is this picture accurate given my conditions?
I also see this sort of mileage at around 55mph steady state flat ground. Using non-winterblend 87 or 93.
I am currently tracking a full tank of 90 octane recreational gas (100% gas) and will let you know how it goes. Going to calculate at the pump.