What is the break-in period?

[jordantii]

Ford typically regards a warm up cycle as being run long enough for the thermostat to open, usually around 180 - 185 degrees coolant temperature. If both lower and upper radiator hoses are hot then you know the thermostat has opened and the vehicle is considered warm. They don't really regard oil temperature in the workshop manual or training literature as relevant to the engine being warm or not. Not saying its not a good indicator as well but that's how we get taught to track engine temperature, its entirely based around coolant temp.

This makes sense since it typically takes the oil temp longer to warm up. I'm going to compare the two on my next cold start. It would not surprise me if 180-190 CT is 160 OT.

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