Like most OM the regular duty OCI is 7500 miles ... For my Elantra PFI and Sedona PFI engines (both in good shape using Fram Ultra Filters + D1 / G2 5W30 syntheric oil) - for mixed , normal suburban driving in Georgia would you consider to run the Castrol EDGE Extended Performance out to 10K to 12K miles OR one year (which ever comes first ?) ... Previously I was using M1 or Pennzoil Platinum 5w30 for 6K mile / 6 month OCI's but thinking I could go longer on the Castrol EDGE Extended Performance oil. ...Your thoughts and experiences ?