Well, I leave mine to warm up to between 45 and 50 degrees C, because that's close to where the tacho goes to normal.
Then I take it easy on it until coolant temp stabilizes (5 - 6 Kms)
After that i'm getting into it depending on conditions of course.
The oil is 20w-50 grade, which shears down to 15w-50 and stabilizes at that grade for the full OCI.
Oil analysis states i'm consistently getting fuel dilution around about 0.5%, which is next to nothing in real world operational terms.
