put the long-standing belief to the test. Based on her experiment, turning a car off during errands instead of allowing it to idle can save drivers hundreds of dollars per year.
Experts say another widely held belief, letting a car ?warm up? before driving, is also not necessary. According to environmentalists, today?s cars don?t need to idle for a few minutes before taking to the road. Experts say that?s simply a waste of gas.
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