because you know going over 55 wastes gas;-)
Sorry but my time is more valuable than gas.
Please move over if a faster car comes up behind you and you are in the left/passing lane and it doesn't matter if you are going the speed limit or 20+ over. Be courteous and move over.
Don't speed up 10 mph when you come to a passing lane on Single Track highway so I have gun it to get around you before the lane closes.