How long to warm up a 10 year old Boxster? - 986 Forum - The Community for Porsche Boxster & Cayman Owners

JFP in PA · 12-20-2014, 08:19 AM

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.

Nine8Six · 12-20-2014, 08:50 AM

What about my A/C, will they decide to "disable" that as well... at traffic lights?

interesting....

Leaving my Boxster warm up 30 secs before hitting the road here - rarely see freezing temp here anyway. Oh and I have 986forum in mind when the car is cold "don't rev passed 2,5k until op temp reached" read that many times here lol
(not complaining)

78F350 · 12-20-2014, 03:07 PM

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.

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.