[Aarongriffey]

I have found getting rid of the roofing tar in the crankcase and changing to 10-30 or thinner motor oil also helps the gas mileage.
Also backing off the accelerator pedal and coasting the last half a block before the stop sign helps too.
They say pulling extra air in the tires does not help! Oh ya?
Push your vehicle in neutral on level concrete and the try it again with extra air in the tires and see if there is a difference.
As for the man’s question,.....anything above 12 in town is GREAT!