I am trying to figure out the most cost effective version of Mobil 1 to use in a 2002 Toyota Sienna, it has 250000+ miles, the choice is between Mobil 1 HM 5w30, Mobil 1 5w30, Mobil 1 EP 5w30 and Mobil 1 0w40, I will run the oil 1 year and about 9000-10000 miles of 50/50 mixed city/highway miles.