Hey guys, I've got an '02 Z28 with 24k mi. I've been running M1 10w30. I'm currently in the rinse phase (MC 15w40) of Auto-RX. I want to start doing 10k / 1 yr. OCI's. I live in Louisiana (temp ranges from upper 20's to upper 90's), drive 10k miles per year with a 50/50 city/highway mix, enjoy...