I know that this will be one of those how many licks to an ice cream cone kind of questions but here goes anyway. I try not to start my 2001 H/O Cummins just to run to the corner stop and rob which would not allow it to reach operating temperature. I use my 82 Jeep CJ-5 for almost all of my in town commuting,and save the Dodge for long trips and towing. The rest of the time it resides in a heated garage. There are times when the Dodge may not start for up to 2 weeks at a time. Do any of you think there is any chance I'm allowing any damage to occur by the inactivity of the engine? My truck is on a strict 3,000 mile oil change program using Delo 15-40. Another factor to consider in this question is the fact that I live in the high desert of Northern Nevada where the average relative humidity hovers around 20%. When I do start the truck it is usually headed for a trip of at least three hundred miles. I currently have 33,000 miles on this truck which was purchased in Sept of 01. Thanks in advance for your thoughts.