Quote Originally Posted by marines542 View Post
Yea but I've noticed when I drive the 400 miles home and DoD runs it burns more. So I'm just trying to help it and slow it down some

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If it was me, and you had planned on keeping the car for awhile, I would disable the DOD completly. A local ASE Master GM Tech took these of a DOD motor with about 60k on it. He said he's seen this a lot on DOD motors with 50-80K miles on them.