Older cars were designed to run most efficiently at around 180 degrees. Newer cars are designed to run much hotter to increase fuel economy using a computer controlled fuel injection and ignition timing to decrease warm up time.
I looked it up. Seems it's about carburetors...
If you’re in a hurry and just want an answer to the above question, it’s no. You no longer need to warm up your car in winter — for your car’s sake — unless it’s old enough to have a carburetor (unlikely unless it’s at least 30 years old), or it’s electric or a plug-in hybrid.
https://www.cars.com/articles/should-you-warm-up-your-car-in-winter-429809/
Warming up is a great way to maintain engine health. You allow it to lubricate itself and, in turn, prolong its life cycle. However, modern vehicles no longer have carburetors, and lubrication takes 20-30 seconds. So, there is no real need to sit idle much beyond the time it takes to defog the windshield.
https://www.jdpower.com/cars/shopping-guides/do-you-need-to-warm-your-car-up
Why Did We Use to Warm Up Cars?
Allowing cars to warm up on cold days is a tradition that goes back decades to when vehicles had carburetors.
Then, warming up the car made sense, as it could take several minutes for the right blend of air and fuel to be delivered to the engine. Without the correct blend, cars would sputter, stall, and leave drivers stranded.
By the late 1980s and indeed,y no later than the early 1990s, all car manufacturers completed the transition to electronic fuel injection. Sensors working with injectors ensured that the right air-fuel mix was delivered promptly. Therefore, warming up cars equipped with fuel injection systems became unnecessary.
Should a new car still have trouble starting promptly, other factors such as a clogged injector, a frozen fuel line, or a dead battery might be the culprit. But those are issues separate from the topic at hand.
Unfortunately, certain habits are challenging to break, and misinformation is rampant. Chances are,e if you had one of those older models and later sold it, you passed this habit on to the next generation. It is time to lay the fallacy to rest, especially for any car built within the past 25 years.
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https://www.carfax.com/blog/do-you-need-to-warm-your-car-up
And...
https://www.consumerreports.org/car...-warm-up-your-car-before-driving-a5580016349/