wirenutt's Forum Comments
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I believe the main reason is that since the air is denser at lower temperatures, the computer in your car has to direct the fuel injectors to provide more fuel to compensate for the denser air. Your Oxygen sensors are constantly monitoring the combustion process and force the injectors to maintain the correct air/fuel ratio of 14.7:1. Other reasons are explained above, namely, the oxygenated fuel and the thicker fluids in your engine, transmission, power steering system, and rear differential for rear-wheel-drive cars. For 4X4s, add on the transfer case and the front differential. Finally, if you live where it snows a lot (like me) there is the added resistance of the snow and slush that your tires have to push through.
posted by wirenutt January 18, 2010 at 1:25 AM