Most of my mpg loss is the morning warm up and acceleration.
Looks like there are areas you can improve on, but sometimes you have to drive the traffic, or however the guy behind you dictates. I use my flashers to encourage passing. On the hills, keeping steady throttle vice steady speed will help some, even though your speed will go down. So this would mean no cruise control going up hills. You could make up the speed on the downhills. You are still doing good - in the low 20's ain't bad for a tank. I'd say 2 to 3 mpg or better is in there somewhere!
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