What brand oil and weight are you using and how often are you changing it?
I only do dealer service at this point. So it’s 0x30W synthetic, I think. Due to the extreme mileage I change it at 5k intervals.
“What brand oil and weight are you using and how often are you changing it?”
My first thought as well - consider bumping the oil weight a bit.
Of course it may be simply that your oil level is a bit down.