I had this oil changed early since it was in service for so long, while sitting for months during the winter. I also drive this car hard from time to time, and fully expected to see higher than average wear metals. Lastly, I wanted to see if I had the dreaded GM intake manifold gasket leak. The oil used was Mobil 1 High Mileage 10W-30, in service for around 7 months, including some below freezing temperatures. My thoughts are that the potassium and sodium seem higher than I would like. The last 3 oil changes have been with oils that should not contain sodium or potassium. The OLM said that I could have gone twice as long (approx 6k miles), so I may end up running at least 5k next time. I was quite impressed with the wear numbers. Any thoughts?