Should You Warm Up Your Car Before Driving?

A couple of years ago, this question would have been answered in a yes. You might be wondering what has changed from then to now? To put it simply, advancement in the engine designs has led to a lot more safer and intelligent engines. The biggest difference between both (Carburetor and modern IC engines) is the manual control of air-fuel mixture in carburetor engines, as opposed to electronically controlled air-fuel mixture with  temperature sensing to increase the engine performance and productivity in (almost) all conditions.

This video describes why carburetor engines need to be warmed up as opposed to their  modern counterparts and goes in to schematics as to what happens in the carburetor engine furring cold weather.

(Video Courtesy: Engineering Explained)

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  • Ali Shahid

    So EFi cars just need 15 to 30 seconds warm-up and carburetor cars need 5 to 10 minutes to warm up before acceleration.

  • Zulfiqar Ali Soomro

    Yes. The oil flow, air-fuel mixture is controlled by the ECU so no need for manual intervention. Just start the car and drive albeit dont floor it instantly. Watch the video for further clarification

  • Guest

    The basic idea is that:
    1. fuel injection can atomize the fuel more effectively.
    2. carburetor alters the A/F ratio to be ultra-rich when it (the carburetor itself) is cold. Since petrol requires excess of air to combust (this sentence was not mentioned in the video), therefore (the following sentence from the video) the engine immediately stall as soon as it is loaded because the A/F would be made even richer which the engine would not be able to combust then. Things would smoothen out when the carburetor becomes warm.

  • Ahtasham

    I think, it’s depend on the model. Old cars take time to warm up and engine noise set after few minutes compare to new card which takes, not more than 2 minutes.