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True or False: The Fuel Economy Myths Quiz
by Staff
Everyone has their tricks for saving gas, but do you know which of these tricks actually work and which are pure fuelishness? Take our quiz to see if you can separate fuel facts and myths.

True or false: Smaller cars always get better gas mileage than larger ones.

  • true
  • false

True or false: Cars with an automatic transmission will never be as efficient as cars with a manual transmission.

  • true
  • false

True or false: Idling your vehicle can cost you 1 to 2 cents per minute.

  • true
  • false

True or false: Aggressive driving can significantly reduce fuel efficiency.

  • true
  • false

True or false: Speeds above 50 miles per hour (80 kilometers per hour) significantly reduce fuel efficiency.

  • true
  • false

True or false: It's always more efficient to let your vehicle idle than to stop it and restart it.

  • true
  • false

True or false: Carrying cargo on top of your car cuts fuel economy by 2 to 8 percent.

  • true
  • false

True or false: Removing 100 pounds (45 kilograms) of cargo from your vehicle can improve fuel economy by 1 percent.

  • true
  • false

True or false: Using cruise control on the highway boosts fuel efficiency.

  • true
  • false

True or false: A 10-year-old car will almost always get worse mileage than one that's newer.

  • true
  • false

True or false: Changing a dirty air filter increases fuel efficiency.

  • true
  • false

True or false: Premium fuel offers no advantages to most drivers in terms of fuel economy.

  • true
  • false

True or false: Ethanol-blended gasoline increases fuel efficiency.

  • true
  • false

True or false: Driver feedback devices can improve your driving skills but don't really help fuel efficiency.

  • true
  • false

True or false: Rear-mounted cargo containers are even worse for fuel economy than roof-mounted containers.

  • true
  • false

True or false: Replacing a faulty oxygen sensor can improve mileage by as much as 40 percent.

  • true
  • false

True or false: Correcting air pressure problems in your tires won't really impact fuel efficiency.

  • true
  • false

True or false: Even a single pound-force per square inch drop in pressure can impact how much gas your car uses.

  • true
  • false

True or false: Motor oil has little impact on fuel economy.

  • true
  • false

True or false: Combining trips saves fuel, especially when it's cold outside.

  • true
  • false

True or false: Cold weather increases gas mileage.

  • true
  • false

True or false: The longer you allow your vehicle to warm up, the better your fuel efficiency will be.

  • true
  • false

True or false: You can boost fuel efficiency by 4 percent by tuning up a noticeably out-of-tune vehicle.

  • true
  • false

True or false: Air conditioning can reduce fuel efficiency by 25 percent.

  • true
  • false

True or false: Rolling your windows down doesn't impact fuel economy when driving on the highway.

  • true
  • false

True or false: Fill your car early in the morning during the summer to get the most bang for your buck.

  • true
  • false

True or false: Gas-saving products and additives can actually improve fuel economy.

  • true
  • false

True or false: Lowering the tailgate on your pickup worsens fuel economy.

  • true
  • false

True or false: Fuel economy estimates are a guarantee of performance.

  • true
  • false

True or false: Around 5 percent of all consumer spending goes to gasoline.

  • true
  • false