Wrong oil. Will it ruin it? 10W-40 in a car calling for 5W-30 - AnandTech Forums
Wrong oil. Will it ruin it? 10W-40 in a car calling for 5W-30 The Garage ... You have maybe done some damage since the oil level with +2 quarts is still really low. The oil cools and lubricates the engine. From the other thread the difference between a 10...