1986 GM 2.8L (iron head MPFI, flat tappet pushrod)
Out: 4q QS Defy 10w30, 1q VR1 20w50, Puro Classic filter
In: 3q QS Defy 10w30, 2q VR1 20w50, PureOne PL24011
-I'd use straight QS Defy 10w40 but it's hardly available and costs more.
noticed it gets oil pressure much faster on startup than before. I didn't think the Pclassic ADBV leaked so it's a little odd.