Join Date: Mar 2006
Location: Minco OK
Thanked 2,703 Times in 2,269 Posts
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Do you live right on an off ramp or exit and immediately shut the truck off and run for the house? If not no idle time needed. By the time you get to a fuel station that is easy on\off of high speed road EGT's are cool enough to shut down. The 6.7's don't run a lot of EGT temp anyway, and unless you are tuned once the load is off the engine they cool fast.
300 is excessive cool anyway and would not do that on an emissions 6.7, 450 degrees is plenty to shut off at.
05 QC LWB 4x4 Auto 3.73 LSD, IssproEV2's, Performance 48RE Opie TransGo , Smarty Tuned BBI Injected