Oooo...my 1st posting! Vehicle: 1998 Ford Contour SVT 2.5l 200HP 5 speed 133,000 miles M1 5w-30 syn for the last 50,000 miles Motorcraft FL820s (always) AFE drop in filter Driving: 80 miles a day/80% highway at close to 90mph (say 3750rpm). Car sees redline not too frequently. I have used M1 5w-30 for a while, but wanted to try something different. I poured (no pun intended) over this site for the past week..basically reading every post in the different forumns that I thought were pertinant. I initially settled upon GC, but in Grand Rapids MI, I could not find it at any auto store. Every bottle of 0w-30 I found was "made in America" and not for sale outside of North America. I then agonized between M1 0w-20, 0w-40, and 10w-30. I settled upon 0w-40, for cold start lubrication, and shear resistance at high-way speed. I'm planning on going with a NAPA gold air filter as well, as my primary concern right now is engine longevity. Thoughts? Comments? Reccomendations?