which one has better FC? AC on or windows down?

• NewAgeSensitiveBoy

  10 Jan 08, 17:10

  I always hear ppl say on AC will increase the FC. However when we off the AC and wind the window down, the air rushing in will increase the drag, hence increasing the burden on the engine, thereby increasing FC also....
  
  so which is which? to save fuel, do we on AC or wind window down?
• kopiosatu

  10 Jan 08, 17:11

  switch on the a/c but u dun have to blast it to antarctica temperatures.
• n0x

  11 Jan 08, 00:46

  switch off aircon and wind down window during city driving...
  
  switch on aircon and wind up window when cruising on expressway...
• NewAgeSensitiveBoy

  11 Jan 08, 11:51

  thks.... i did a search yesterday and it says that any speed below 50km/hr wind down window.... abv, on AC and wind up window.... hope it helps.....
• NoobBOY

  11 Jan 08, 20:30

  Do u mean Fuel Consumption
• NewAgeSensitiveBoy

  11 Jan 08, 21:41

  Originally posted by NoobBOY:

  Do u mean Fuel Consumption

  huh? FC = fuel consumption, AC = Air con
• longgone

  11 Jan 08, 21:51

  Yeah, AC on is best. Unless you superhero can drive in singapore heat with windows up and AC off.
• mh2

  11 Jan 08, 22:25

  Originally posted by longgone:

  Unless you superhero can drive in singapore heat with windows up and AC off.

  you be surprise ppl do that
• xXhuskyXx

  14 Jan 08, 12:21

  window up AC off...that way u can reduce drag and save the FC on no aircon, end result is that u might sweat like nobody business
• alwaysdisturbed

  14 Jan 08, 12:26

  mythbuster did a test on it.
  
  if i didn't remember wrongly. at low speed, its better to wind down windows.