I was planing on picking up some M1 EP 5w-20 with the pepboys special and extending to a 10K oci. After reading this I may opt for the M1 AFE 0w-20 instead. This would go in either my 00 grand marquis 4.6, or 04 Grand marquis 4.6, or the 05 santa fe 2.7, or 2010 SHO with the 3.5 ecoboost. any...