I found a jug I forgot I had of M1 10W30 EP (less than two years old and sealed) . OCI per the manual with 5 qrt. sump is 7,500 . I normally run M1 5W30 (non EP) , PPPP 5W30 or Valvoline 5W30 Synthetic for 6,500 to 7,500 miles with a Fram Ultra filter (about 50% h'way and 50% suburban driving ) ... I know the M1 EP synthetic oil has better base stocks - I don't expect to go 15,000 miles on it but would like to think I could go 9,000 to 10,000 miles on it ... Your thoughts with '07 Kia 3.8L V6 with M1 10W30 EP ?