Quote:
Originally Posted by JFP in PA
This subject is one of the great misunderstandings of the car world.
-Allowing the car to idle for several min. to warm up does absolutely no harm, and in fact if very beneficial to both the engine and drive line.
-The reasons your manual tells you not to let the car idle is the exact same reason they now come with a system that shuts the engine down at traffic lights: CAFE ratings. They say that purely to try an improve the cars gas mileage, which is also why the car supposedly needs 0W oil. OEM's will spend millions to try and eek another 0.2 MPG out of the existing car designs rather than come up with improved engineering designs that require retooling their manufacturing.
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Thanks for posting that info JFP. I had read the manual and wondered about the reasoning behind not idling to warm up. I had thought that it may somehow be bad for the engine, but I couldn't understand why. So... management decision.
