Today was a nice day and i went out into the countryside driving in third gear around the SE WI twisties.
So I was in third from 2,500rpm up to 6,000rpm, just leaving it in one gear.
During my drive the usual 'not so bright' person in a bright green new Fiesta was going the other way around a blind curve, two full feet my side of the line. I was able to move over without incident. they just held thier line. Idiots. Lucky for them i was not a farm truck. They would be hurting bad.
Anyway, it is odd how this clears up the mpgs. Afterward, my mpg's went easily back up into the 40's on the freeway back home.
I think I have messed up the fuel stuff by swapping back in the stock air filter, then going back to the K&N soon after.
With the country ride (so my theory goes) the car had the stuff to recalibrate bettter the fuel map, and i am back to better mpgs.
The pity was I got near town and the freeway was blocked, got off took hywy, that was under construction, went over to another and big accident.
So no matter what i did I was stuck in major traffic jam. (why do cops clear a giant area, so no cars could go through at all, everyone on a four lane road had to go down a little side street with stop signs.. Traffic must have been backed up for miles, eventually. (both cars were off the road, and in a grassy spot.)
So the story here is take it out and drive around in the countryside, have fun. Let your motor rev and play around. It may improve your gas mileage.
PS while in third and blasting around, my short term av. mpgs did drop into the low 30's..