[Jay S]

A lot of oils show close to 10w loss in shear by the end of the oil change. That test came back as almost a thick 10w30. The wider the weights are between the cold and hot index is, the more it tends to shear. All oils I can think of show shear with use, some worse than others. I would call GP1 kind of average on that, the GP1 20w50 does better on shear than 15w40. I run GP1 in my cars. The majority of people never realize oils shear because they never have their used oil tested. Doesn’t mean the oil is necessarily bad, for example Mobile 1 5w40 usually drops to a 0w30 before 2000K miles, but it tests good monitoring wear.

The sample looks like it came back very well. I agree with Larry, the lead was not coming from the bearings. I doubt it came from anything wear related at all. That was likely leaching from the additives your adding to the fuel. I would say you have a good starting place to monitor your next UOA. I think I would go a full interval on the next oil change.