I have two trucks. One is for work, 2008 F-350 and one is my daily driver, 2011 Silverado 2500HD
My work one gets a lot of short trips and plowing and not many miles and my daily driver doesn't get used a lot, maybe 5000 miles a year.
I do the oil and filter in both every 6 months with Mobil one synthetic. I figure an oil change is less than 30$ per truck. That's only $60 a year, times two. For the peice of mind I don't mind spending the little bit of money. In my mind it's pennies compaired to what these trucks make me $$
Matt