absolutely lol, i bought my truck at 2016k miles with conventional 15w40 in it and it was extremely hard to start cold even at 40F ambient. i kinda think that if the PO would have used synthetic 5w40 that the injectors would be in better shape right now. the good thing is that as soon as i switched to a full synth 5w40, cold starts became much much easier and the 'stiction' symptoms aren't as severe. at least the injectors aren't getting worse... yet. . i think the treatments like archoil and revx that i've used probably helped a bit too.I've heard that the 6.0 doesn't like 15w40 oil. Something to do with injector issues. Can anyone confirm this?