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"Smart Motors Toyota says letting your car idle in cold temperatures can shorten the life of your engine by stripping away oil from the engine’s pistons and cylinders — two critical components that help your engine run, Stephen Ciatti, Ph.D., principal engineer for battery systems at PACCAR, told Business Insider in 2016.

Gas-powered cars need oil to keep their engines lubricated. When you start a car, an oil pump circulates the oil in less than a minute. But if you let your car idle to warm up the cabin, the oil will start to slowly drain away from the engine's key components since the engine isn’t moving the car.

“Less oil means more friction, more wear and tear, and a shorter life for your engine,” Firestone says.

While some people let their cars idle to warm up the interior, others may actually be trying to protect their engine because of outdated guidance."

"Instead of waiting for your car to warm up in the winter, most manufacturers recommend driving off gently after...

Toyota Prius Gets a $140 Catalytic Converter Guard to Protect It

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