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IngredientsAfter starting my drive at 5am, I see the smoke coming out of my car in the rear view mirror. The smoke disappears after the engine has reached its normal operating temperature. Similarly one can see smoke at the tail pipe of almost all cars coming out of various subdivisions in the morning. But no car on the highway has a smoke trail behind it. Hence the question - do cars burn more gas after a cold start until engine becomes hot enough?
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