Where did I say to wait until the cooling fan comes on?!:banghead:retardclap
Here is an example. My Vette runs at about 180 degrees around town, and I don’t romp on it until the oil temp is above 150 degrees. It takes roughly twice as long for the oil to get to 150 degrees then it takes the coolant to get to 180. Same rough concept applies to just about any internal combustion engine.