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The biggest winter energy myth: That you need to idle your car before driving

WASHINGTON POST

CarEngine. . . . .   it turns out that this idea of idling your car during the winter is just wrong. And so are the many, many Americans who believe it — one 2009 study found that on average, Americans thought they should idle for over 5 minutes before driving when temperatures were below 32 degrees!

. . . . older cars — which relied on carburetors as a crucial engine component — did need to warm up to work well, according to several auto industry experts. Without warming up, the carburetor would not necessarily be able to get the right mix of air and fuel in the engine — and the car might stall out. During the 1980s and into the early 1990s, however, the auto industry did away with carburetors in favor of electronic fuel injection, which uses sensors to supply fuel to the engine and get the right air and fuel mix. This makes the problem of warming up the car before driving irrelevant, because the sensors monitor and adjust to temperature conditions.

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