10 Ways you can Save Gas from Goodwrench:

[Jim]

1. Go the speed limit. Use cruise control. You can get up to 20 percent more mileage traveling 55 mph than 70 mph.

2. Drive evenly. Avoid hard stops. Quick starts burn gas while hard stops also cost you. Take your foot off the accelerator and coast a bit before stopping for a traffic light or a stop sign.

3. Avoid idling and rush hour traffic. You're burning fuel while idling - up to a gallon every hour.

4. Open windows at slow speeds. Use A/C on highways. Around town, turn your air conditioning off and roll down the windows. On the highway, open windows create drag at speeds of 40 mph or more, so roll them up and use the air.

5. Remove junk from the trunk. Added weight in your vehicle affects fuel economy, so take unnecessary items out of your trunk.

6. Fill up when it's cool and before holidays. Cooler temperatures in the early morning or late evening create less vapor. Also, getting a fill-up three days before a holiday will help you save on the per-gallon price at the pump.

7. Don't top off gas and tighten the cap. When buying gas, stop when the pump shuts off automatically. And remember, your tank needs both fuel and fumes, so tighten the gas cap after every fill-up.

8. Use the correct fuel grade. Use the fuel grade recommended by your vehicle manufacturer.

9. Don't accelerate up hill. Build up speed before an incline, and then maintain it on the way up. Coast on the way down for additional fuel economy.

10. Avoid rooftop carriers. Approximately one quarter of each gallon of gas is needed to overcome wind resistance, so avoid carrying things on your roof. If necessary, use an aerodynamic carrier to help minimize drag.

[1LoC10]

i drive 100 miles a day to and from work with my crew cab... i was seing 15MPG with it, the past week I have been using cruise set at 65MPH and have been getting 20MPG out of it... thats about 95% highway driving... not bad for big v8 crew cab lifted on chrome 20's and big 275//55/20 tires

[Sierra H/O]

I've been driving 70(instead of 75) on the interstate going to work. I take a 2 lane road coming home and go 55-60. Right now, my DIC says 18.1. I'll check it when I fill up, but I have always found it to be real close(like .1 mpg close). I'm going to get a Diablosport Predator later this year and some kind of a CAI(probably S&B), I'm hoping to break 20 mpg.

[TheBigRedZ71]

according to mythbusters there is only a .0007 or some small decimal percentage difference in riding with the windows down and riding with ac on on the highway, i ride with mine down all the time, and if it gets real hot i leave em down and crank the ac, i get 10mpg no matter how i drive