Most efficient gear for Interstate Cruising?

[RandallNeighbour]

I'm betting that driving with the spoiler up will also decrease fuel economy. This makes me think that if I'm going to settle into a long cruise control-controlled ride at 70 mph on the freeway after passing a truck at 80 mph, I should slow down below 50 mph just to lower the spoiler and then raise the speed back up to 70 and ride spoiler-free.

Problem is I don't think about that spoiler since I can't see it and rarely think about it.

[wild1poet2]

Trade it for a Prius.....

Don't worry about the gas prices. Just go....
If you are going to worry about gas, then worry about insurance and repairs...especially tires!

Just think how much better off you are then all the SUV owners....

[JP-s-in st. louis]

3rd gear so you can get to 102 in a blink.