I have been searching around here for any kind of UOA or anything about Lubro Moly 0W-40. I found some information about their 5W-40, but still nothing on their 0W-40. Well, I changed my filter and put in the 0W-40. My gas mileage went up and the car purrs like a kitten. I was using Amsoil's 5W-40, and it just seemed "too thick" for a new car. Could someone please bend my ear or suggest if a 0W is better then a 5W? I know they are the same at operating temp and all, but I like the idea of an oil circulating faster throughout the engine and the 0W seems to be doing that and at $35 for their 5L bottle, it seems to be great.