Did a normal fluid check yesterday and even though I have no signs of an injector problem I did the paper towel test on the oil. The truck was cold when I checked the oil, left a lighter ring around the outside of the towel but then it all faded into the same shade after a short moment. No smoke at start up, no hard starts,in fact it fires instantly,no misses. Not sure this test is a valid one but the oil did seem to be a little thinner than normal. Could just be my paranoia, 119k on the clock. Comments??