Well, for about the first week of having Mobil 1 in my car, it didn't really have all that much more cold start noise, but this past week, it has been progressivly getting louder and louder. So, I removed my oil filter (purolator) after the car sat overnight, and it was completely dry. Now, I've done this before several times with dino, and purolator filters never bleed down with dino. So, I installed another purolator, and removed it 10 minutes after I shut my car off, no oil whatsoever in the filter. And I mean my car is LOUD when I've been starting it like that (no oil in filter) So, I said screw it, bought two more filters and some penz 5w-30 High Mileage, and repeated all the testing, and each and every time, the filter was full of oil, even after sitting overnight. Perhaps Mobil 1 is so thin it can just escape the ADBV and that is what's contributing to people's cold start knock with Mobil 1 All I can say now is that I've changed my mind once again to being negative about Mobil 1. My car is just way too sensative as far as having oil in the filter at startup. It sounds worse than my Grand Am did! Oh, and I tried the Fram Sure Drain, and hate it It sticks out way too far for my liking and it takes about 20 freakin minutes to drain just to the point where it is starting to drip instead of a steady stream of oil. I can change my oil with the drain plug in under 10 minutes!