I am just starting my second ARX cleaning with synpower 5w30 and MC 820s filter in my 99 Expedition 5.4 SOHC,i was using TSO 0w30 after the first cleaning but still had slight lash noise.The noise has now all but disappeared so I'm wondering about either the S3K or the new SSO for this ford modular.Does anyone have experience with these oils in this type engine?I drive approx 10-12k a year and would like to stay with a once a year OCI.Thanks