Can You Really Lose Fuel Efficiency If You Decorate Your Car For Christmas?

It’s that time of year again for cheesy, over-the-top holiday car commercials. There’s only so many ways to sell a car and tie it in to the Christmas season. But GMC has a new take on it.

The automaker brings up the question “How do Christmas decorations affect gas mileage?” in the ad campaign for its new Terrain. They put different decorations on a new Terrain and send it into a wind tunnel. They found that a wreath on your front bumper has no effect, but those reindeer antlers and bows on the roof can set you back as much as 3 mpg. And a tree on your roof rack drags nearly double. Obviously, people that decorate their cars for the holiday aren’t worried about their mpg, but it’s still an interesting point. Check it out on

This week on PowerNation Katie’s featured ride is a rare 1969 Pontiac GTO Judge. Owner Bill Stovall got it from a salvage yard 18 years ago and did a total frame off restoration back to like factory new. Only 58 came with the Ram Air-4 engine with automatic transmission. That classic color is “Carousel Red” with an interior as stock as it came with black bucket seats, an AM radio, no power seats or power brakes. As Bill says “This is a muscle car that takes muscle to drive”. Along with the tech from our four shops, Team Summit NHRA Funny Car racer Tim Wilkerson has a tech tip on relays. Check it all out this week on PowerNation.

And from all of us here at the Tech Center we wish you a Merry Christmas, Happy Hanukkah, and Happy NewYear!!