I have a 2007 Focus 2.0 bought new in August of 2006. This is by far the most trouble free vehicle I have ever owned. Just crossed 180,000 miles and the oil is always on the full mark. OCI’s of 5,000 miles. First 35,000, Motorcraft 5w20. At 35,000 switched to NAPA (Valvoline) 5w20 full syn as by best friend owns a NAPA store and every few months they have really good prices on the full syn. Always used Motorcraft FL-910S filters. On a whim, I bought 5w20 Super Tech full syn for the 175,000 change. When I changed it at 180,000, the oil out looked about the cleanest of any used oil I ever took out. In the past, it was always pretty black, but the Super Tech did not look very dark. Could it be that the Super Tech does not clean the engine as well as the NAPA? Or just my imagination?