I used to run mineral oil for the first couple of oil changes (10,000 miles) before switching to synthetic oil.
My oldest son attended the Motorcycle Mechanics Institute a few years ago & passed on what he learned about breaking engines in to his dad.
I realize now that an engine broken-in properly can have the mineral oil used for break-in drained immediately afterwards and begin running synthetics. The rings should be seated after the first running of the motor. For practical purposes, I would recommend 500 miles on mineral oil, drain it & begin using synthetic.
Have you ever noticed how break-in oil drains out with a green color? That's the metal left behind from machining. Don't leave that oil in long. (Motorcycle trans oil also takes on a green color due to the wet clutch)
Marlin, my mother lives in Escalon, I'm familiar with your area.
George
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