Do we need to warm up the engine car before we drive it some says it will damage the engine and short the engine life and some says it wont damage the engine i live in area temperature between 10 C in winter and 40 C in the summer .
Yeah, I never let it warm up, I just drive slow for the first few miles. My oil analysis showed an abnormal lack of engine wear. My temperature range is from -20 to 40 C and last year was the coldest winter on record.
I didn't know that people still believed that old wives' tale to this day until somebody else asked me about it. In short, as everybody else here has said, it's pointless and serves only to waste fuel and increase engine wear. I've started my car from 10 days sitting, put it gear and drove across town with no problems.
In very cold weather, at least cold for Alabama (mid-20's F, around -5C, and colder), I'll let mine idle for a minute or two before I put it in gear. In hot summer weather, it idles maybe ten seconds at the most before I drive away - long enough to start, put on the seat belt, and change the station on the radio.