If I understand this right 10w is when the oil is cold and the 30 is the viscosity when it’s at operating temperature, let’s say 190 degrees.
My question is how long does the oil stay at 10 .
My truck probably takes 6 miles to get the temp all the way up.
My question is how long does the oil stay at 10 .
My truck probably takes 6 miles to get the temp all the way up.