i never ran hot, though the a/c wouldn't run as cold (mine runs cooler when air is flowing).
i usually judge being in a "good" draft by rolling down the windows, and when it starts to get quiet, i know i am in the "pocket". it is quite effective...as jack said, you can sometimes let off the gas, put it in neutral and get pulled along. i am also a cyclist, and i've had friends allow me to draft their vans when biking...also very effective

Ditto on the quiet in the "pocket thing", it'* such a cool feeling going so fast with sound of the turbo off the diesel in front of you

wonder what kind of mileage I would get doing that. I get over 500 miles on a tank driving normally.

what? how do you do that?

technically, if you have an 18 gal tank...and you average 25-29 mpg...BEST case scenario would be a little over 500 miles...i average 23 mpg...so getting nearly 600 miles on the tank was a nice surprise.

I never let it get that low. most gallons I've put in is 16. I've only heard the low fuel dingy once or twice.

Be careful!!! All it takes is quick stop from the trucker and that money you save on gas is going to the replacement of a front end.

Travis' car is some kind of GM phenomenon.... it doesn't follow the normal rules of wear and tear. I will never cease to be amazed how well that car runs. Brand new Bonnevilles from the factory don't have anything on his ride. Travis.......... you have a freak on your hands

I've pulled over 35 mpg with straight highway driving on a trip back from North Carolina, without the aid of drafting

what!? my buick can only SQUEEZE out 28 in absolute, no nonsense granny mode. during that mode, i don't even let the rpms get above 1800 before the car shifts into the next gear. takes about 45 minutes to get to 60 mph...but it saves gas course, i have 173,000 miles on the beast...but still.