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It was on automotive conventional oil and it admittedly had more viscosity change yes, but lower wear levels. The first sample was not factory oil. Oil was sampled the first time after about the 5th oil change.

2,500 miles.

Yes, it was Valvoline full synthetic motorcycle oil. Oil pump is a gear type. OCI is already on the shorter side. Keeping it around 3k sometimes shorter if leaving for a longer trip.

It's only about a 2quart system. Very similar engine as a KTM thumper like the 390 Adventure.

Thanks for the diagram and explanation. I understood that it was a flow rate at a given temperature over time. You caught me slipping. The oil thick or thin is like saying pumps create pressure, when pressure is a result of restriction to flow. With the engine oil shared eith the transmission...

I received the results back from the second oil sample I have sent out on my motorcycle. The bike is a (Chinese) 2020 CSC RX4. Engine break in was conventional oil. I swapped to full synthetic after collecting the first sample. The second sample was in engine for 3,500 miles not 35000 (lab...