by Answerbag Staff on March 15th, 2010

Answerbag Staff

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Is it good to warm up a car before driving?

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  • by Sommer Leigh on March 15th, 2010

    Answerbag Experts

    Great Answer

    Professionally Researched. (What's this?)

    On One Hand: Warming Unnecessary

    According to Tom and Ray Magliozzi, the hosts of Car Talk on NPR, "on modern, fuel-injected cars-- basically anything made in the past 20 years--you're not helping the car at all by warming it up for five or 10 minutes." On older vehicles, warming the car before driving "can damage the engine by diluting the oil with excess fuel. So it's even worse if you have a really old heap."

    On the Other: Consider Temperature

    "If it's bitterly cold out, like 10 or 20 degrees Fahrenheit or lower, you can let it warm up for a minute or two to allow the oil to thin out a bit and circulate completely," says Tom Magliozzi.

    Bottom Line

    Cars do not need to be warmed up before driving. Doing so can actually cause more harm than good. The only time you may consider warming the car beforehand is if the temperature is lower than 20 degrees F.

    Source:

    DallasNews.com: Think Cars Must Warm Up Before Driving? Think Again

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