Engine: Manual Z18xe
Current oil: Castrol Magnatec 10w 40
Previous oil: Vavoline Durablend 10w 40
Feeling: the valvoline was ok no probs, but now the Castrol Magnatec is casuing the engine to run a bit rough and idle bit poorly.
Next I will try the
Nulon Full Synthetic 10W-40 Hi-Tech Fast Flowing