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Automotive Fuel Efficient

Automotive Fuel Efficient

Automotive Fuel Efficient

(OP)
Fuel Efficient and Economical: Windows Down or A/C On?

Hi-Tech AES (Automotive Engineering Services)

RE: Automotive Fuel Efficient

Windows Up - A/C Off --> Most fuel efficient and economical

RE: Automotive Fuel Efficient

Trying to win a bet or argument?

I too say it depends.

RE: Automotive Fuel Efficient

mythbusters did this IIRC. dont remember the outcome

RE: Automotive Fuel Efficient

Best economy is to have windows up and air-con off, if you're girlfriend complains about the excessively hot cabin try wetting her T-shirt with water. (be careful with this method, as often the following activities can result in an unwanted pregnancy which totally kills economy).

RE: Automotive Fuel Efficient

Of course mythbusters is about as scientific as trying to measure the mass of dog farts with a tape measure.

RE: Automotive Fuel Efficient

given that the power to overcome drag is a function on velocity cubed defining the speed is a slightly important. it would be hard to imagine that opening the windows on a modern German car travelling on the autobahn at 120mph+ would use less fuel than a modern efficient A/C system. it is also hard to imagine that in bumper to bumper traffic of a few MPH that opening the windows would have any meaningful effect on fuel efficiency but the parasitic loss would be measurebable

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