so you do realize gear oil gets reallly really thick when its super cold right? when it was 10f out my car stalled when i let the clutch out (an it wasnt in gear!) im running 85w140 though.. as long as its like 20 or above its fine tho, rpms dip but comes right back up..
if you have a tuneable ecu i'd suggest playin with the cold idle tables
if you have a tuneable ecu i'd suggest playin with the cold idle tables