yep, sitting like the MP's do ideling allday long. Or us guys who work out doors in the heat, get in the truck and crank up the AC sometimes to eat in the cold or in the winter, eating in the heat, while the truck idles.
My neighbor down the road works for the phone company. He has a 2000 E250 van with a 5.4L It has 160,000 miles on it. Never any major problems other than a few COP modules, ball joints and tie rod ends, tires, and brakes. The funny thing is he is on his second drivers seat and getting close to needing a 3rd.
Most days his truck runs 8 hours a day, most of it idling. All my trucks, 2 Fords and a Nissan, have hour meters on them and they also tell you the average speed. I have averaged just over 35 mph for the life of them on all three.
So lets do some math. His truck is 10 years old. He gets 4 weeks of vacation per year and works 5 days a week unless he works overtime. Keeping the math simple lets say he works 48 weeks per year, 5 days a week, 8 hours a day. 48x5x8=1,920 hours per year. Now take that times the 35mph. 1,920x35=67,200 miles. Now times the 10 years he has had this truck. 10x67,200=672,000 miles.
Now I know he has not driven 1/5 of them miles but you can see how these trucks are used. Another way of looking at it is the truck has ran for 10 years at 1,920 hour per year. 10x1920=19,200 hours or 800 days of running time, nearly 2 1/4 years.
Chris