I have heard that idleing you truck for extended periods is bad?? Well, I have a unique problem in that I work only about a half mile from where I live.. Morning temps are droping into the teens, and soon single digits.

 

I normally go out and strart the truck and let it run for about 15 mins, drive to work, and then let it run at least another 10 before I shut it off and go in... The high idle  stays engaged most of the time.. about 1050-1100 rpm

 

Which is worse,, start it up cold, and shut it down cold? or let it warm up as much as possible?

Actually idle time in calculated on engine load so its impossible to see without the scan tool

Actually idle time in calculated on engine load so its impossible to see without the scan tool

 

 

I said "sort of".....................via the average total engine hours.  The lower the average MPH, odds are there is more idling time!!!!

My truck life average is 32.9, and 33.7 since I bought it. The new engine average is 29.7. I have very little idle time, and aside from stop lights almost all my idle time is for cool-down from towing.

I don't do a lot of high speed driving these days, 71 is about as fast as I go and that's rare. Last year I only did one tank with an average above 60, and I have one tank with an average of 11.5 without a lot of idle time.