Hey guys, I've been hypermiling for a while now and seem to average about 30mpg in my CR-V. I've got a few questions though on improving my mileage. First of all, now that the weather is getting colder I need to use the heat in my car. I was wondering what you think is better, having the heat all the way up and the fan power on low, or the heat barely on and the fan power on high? Secondly, what's your guys general opinion on cruise control. I know it helps to keep the car at steady RPM's but in my automatic CR-V, it down shifts and the RPM's shoot up if I go up a hill in cruise control. Should I use it or not? Lastly, I also have a really old Mazda B2200 i think like an '89 and it's manual. But I assumed it got terrible mileage because it's a pickup truck. Then I read somewhere that it gets pretty good mileage, which car should I be driving more often? Thanks for your help. edit: I was just reading about getting better mileage here:http://www.fueleconomy.gov/feg/driveHabits.shtml and it says using overdrive gears helps. Is that one of those weird numbers I can shift into on my CR-V? Cause it has a bunch of drive modes I can shift to and I don't know what half of them do, even after looking them up in the manual.