Originally Posted by ArmyofOne
The oil passages are too small for 5w-30. You will not get proper lubrication to the crank and rod journals, MDS on or off, 5w-30 is a BAD idea.
Hey Ramtech, what are your thoughts about this? Dino oil and Synthetic molecules are also different, synthetic being a tad smaller and more consistent in size, but the point about the oil passages is interesting.