I have a Ford 4.6L SOHC V8 (2000) that makes a tad more noise than I want with the 5W-30. I hear that LS1 owners switch to another type of oil and the noise goes away. I'm thinking if I step up to a slightly thicker oil, it might protect the engine better. What I'm really concerned about is the nylon timing chain tensioner arm wear as well as valvetrain bearing surface wear. My car sees year-round driving in Michigan. From sub-zero temperatures to 100F (ambient). Should I go with M1 10W-30? Or 0W-40? Or a home-brew mix of 10W-30, 5W-30, and 0W-40?