I went on a four hour drive and it was with windows down and sunroof open and still got 30-33MPG on my 1998 Civic.

 

Well ej6buddy, fast food restaurants disgusts me personally.... however, I have to give you kudos for that line as it was funny as hell...
The tilt feature doesn't cool the car down as much though, since I live in Florida.

The reason I care so much about gas millage is that I drive to school everyday and I live like 15 miles away from it... having a round trip of 30 miles per day, i kinda want to cut the gas consumption...

 

yeah, i hate fast food as well. my suggestions are to inflate your tires to where they don't sag as much, um, don't use anything but the lowest grade gas (87 lowest), and don't drive the car very very hard, just drive normally, and shift at the normal shift points stated in your manual for maximum gas mileage. if you carry a lot of crap in your car, remove it if it's not needed.

 

sometimes, you can shift before the specified shift points to keep the rpms down...

 

that's basically what i said, but if you shift too low, then the motor will bog down and you'll lose fuel economy.

 

These are my normal shifting points:
1st: 0-10
2nd: 10-18
3rd: 18-28
4th: 28-36ish
5th: 36 and on...
I know this is way below the recommended shifting points, but are these too low which will result in motor bog down??

 

depends on the motor and transmission mainly, i have no clue what you have, so that's why i said look them up in your manual.

 

Also, you can just listen to your motor and just hear her talk to ya.

 

I have a 2005 Honda civic EX
the manual recommend the folliwng for cruise acceleration
1st: 0-7
2nd: 7-22
3rd: 22-33
4th: 33-48

So, how would that compare to my way of acceleration? would my shifting cause engine bogging down?

 

just drive how you think is necessary, i mean, all of this will work in theory, but the actual gains you'll see are very minscule, so i'm just suggesting to drive normal, and as long as you don't drag out the rpms, then you'll be fine, if you're worried too much about it, then just buy a hybrid.