Does driving with the sunroof open decrease fuel efficiency?



  1. 0 Votes

    There is an argument that an open sunroof does affect fuel efficiency slightly, just like open windows do. It is a small amount, but a drag caused by an open window or sunroof does lower fuel efficiency. The numbers are comparable to air conditioning, which does affect performance and ultimately fuel efficiency, but the numbers are very close. It’s pretty much negligible but ultimately, an air conditioner is less fuel efficient than the drag caused by a sun roof.

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