Metal in oil

↑↑↑↑ idling then 10 mile drive isn't doing any favors. You will get fuel dilution and moisture in your oil. The engine has to get the oil up to temp to boil out the water and fuel. Otherwise you might as well save your money on the good oil. We cut the oil filters at work after dyno runs. I commented a while back, I should cut my filter next time. The engineering manager said NO! you will likely never trust your truck again!