The Cummins team that put the first diesel in a Dodge pickup coined the phrase "Wendy's test". It passed the test when you could leave the engine running when ordering from the drive thru.

I don't think the older Cummins ISBs ever passed that test, yet I believe the new 2010 Cummins engine comes pretty close. I've never had to shut off the engine at the drive thru on the X5, and like Penguin........I like the sound at idle.......

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HP gets you to speed, Torque keeps you there !

1928 Model A Coupe
1957 MGA SOLD
1994 MBZ SL320
2007 Acura RL
2010 X5d 11/13 PCD