Drivers are always looking for way to save money while filling their gas tanks, but some popular theories on how to save money on gas may not work.
Myth #1: It's better to fuel up in the morning
Some people believe that buying gas early in the day, when the air is cool, means the fuel is denser, and you'll get more bang for your buck.
Bad news for you early-risers! Consumer Reports says that's wrong.
"In our tests and the analysis we found, it really doesn't matter. Because the gasoline itself is stored underground, the temperature barely changes, if at all," said Deputy Auto Editor Jeff Bartlett. "We say fill up when it's most convenient for you."
Myth #2: Replacing your air filter will save gas
While you should follow your instruction manual and change your air filter accordingly, in newer cars, experts say, it won't make much of a difference at the pump.
"On old cars, a dirty air filter can make a real difference with performance. But on new cars, with all the self-adjustments that they can make, we found in our testing that it actually doesn't have a big impact," Bartlett said.
Myth #3: Premium gasoline is better for your car
Consumer Reports says unless you user manual says you need premium, go ahead and save the money - fill up with regular.
Myth #4: Driving with a pickup truck's tailgate down helps with fuel efficiency
This is not only wrong, Consumer Reports says it tested this myth with a pickup truck and found the vehicle used more gas with the tailgate down.