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Absolutely... I have had almost 50 cars since I started driving and always let them warm up for 5 minutes or so. You can tell the difference when you let it warm up vs not doing so. Never had any problems, and several of the cars were well over 200k. And for those that will argue you are wasting gas, are you really wasting all that much gas? Seems to me most of us would gladly lose an insignificant amount of gas mileage to extend the life of our costly vehicles..... (: Just my 2 cents....