"Clocked" miles and "Rolled" miles might be 2 different things for some of us, if you have larger tires than they will be different. "Clocked" miles are easier to figure out though so I will stay with that......
So far you guys are some light weights with your trucks.....my current truck hasn't been driven as much as my old one, so it hasn't "pulled" it's weight YET.....however I have clocked 16,000 miles on it so far(just under one year...about 11months) It has had what ever I can get my dirty little fingers on put down the tank, I am a little safer with this one cause of the new motor....
Now for my old truck, in the 2 years I had it I "Clocked" just at 41,000 miles on it in the 2 year time.....she definitely "Earned her keep" as they say....although the "rolled" miles would have been a bit more she had 395's on her.....same thing I poured everything in that tank!!!! Some stuff I "tested" by putting a stick in it and lighting with my lighter, if it burned it went in the tank!!!