A return to 55 would be perfect for me. 50 would be even better. 45 makes be get about the mileage of me going 70, because it downshifts up to 2000rpm (how much it takes me to go 70, except without drag factored in.) If the speed limit was 45 I'd drive 50 (which is what I do anyway hehheh). 55 is ideal I think. go do it