3 ms·

My source was a government site, make of it what you will. I may have worded it more strongly than I should have. https://www.fueleconomy.gov/feg/hotweather.sht

My source was a government site, make of it what you will. I may have worded it more strongly than I should have. https://www.fueleconomy.gov/feg/hotweather.shtml https://www.fueleconomy.gov/feg/hotweather.shtml

chrisco255 2y ago
Consumer Reports did a study on this and it only reduced gas mileage by 3% on a Honda. https://shop.advanceautoparts.com/r/advice/car-maintenance/common-ac-and-fuel-efficiency-myths-debunked https://shop.advanceautoparts.com/r/advice/car-maintenance/c...
- boomboomsubban 2y ago
  At 65mph and ~85 degrees. The page I linked sources several studies testing at many other temperatures and speeds.
  - chrisco255 2y ago
    No car takes a 25% hit from the A/C in gas mileage.
    - boomboomsubban 2y ago
      >The internal combustion engine (ICE) variant has an estimated fuel efficiency of 14.7 mpg‑US (16.0 L/100 km), decreasing to 8.6 mpg‑US (27 L/100 km) when the air conditioning is on.