Does anyone know if it will make a difference if I use 5W-30 instead of the recommended 0W-20 or 5W-20? I use Mobil 1 Extended Mileage (15,00 mile stuff) and the lowest weight that they make it in is 5W-30. I just traded my 2005 model for this one and it had the 2.4 liter 4 cylinder and that is what weight oil I used. What do you guys think? Personally I don't see where it would make a difference.