Dan Bryant and his son Connor are men on a mission.
"Instead of trying to get from point A to point B in as little time as possible, you're trying to use as little gas as possible," said Dan.
It's a strategy called hypermiling, and it's a lot like using cruise control.
Drivers try to anticipate conditions a half mile ahead, so there are fewer surprises, and fewer sudden stops and starts. Its all in the name of fuel efficiency.
Hypermiling may mean taking roads less traveled, and it definitely means being comfortable with people passing you.
"Maybe its watching Dukes of Hazard, but they get in this mindset that they have to be the first one at every light," said Dan of many drivers.
He says that aggressive driving burns gas. Instead, hypermilers navigate the roads like someone riding a bicycle, and don't necessarily go as fast as they can.
"They're also not going to be pedaling as hard as they can to be the first person at the light." said Dan.
Driving a little slower can mean big savings.
"It adds about 10 or 15 minutes to my commute on average, but I save at least $600 a year in gas," said Dan.
He only fills up once a month. At the end of our trip through Bryan-College Station our fuel efficiency rating was 85 miles per gallon.
If you'd like to try hypermiling, a good place to start is on your way to work.
However, to save gas, most drivers will need to leave a little earlier than normal.
The first step is knowing your car's fuel efficiency rating.
To find that out, you can go to http://www.fueleconomy.gov/
For more information on hypermiling, visit the Houston Hypermiler's Club at http://www.106mpg.com