Hello folks I've been running M1 5w30 in my 02 Durango 4.7 162k miles since I bought it at 130k. It runs really smooth on the M1 bbut last winter I noticed some rough sounding start up noise. This year the noise seems to have gotten worse, it only lasts the first few seconds on start up but idles a little rough until fully warm. After that it runs smooth like normal. The noise isn't necessarily a knock, is just like excessive vibration noise. Kinda hard to describe. Should I consider running different oil in the winter? I'm traveling in Tennessee right now and my truck definitely doesn't like the colder weather. Thanks for any info. Also open to trying oil or fuel tank additives if it might help.