Hi folks, New UOA on my watercooled 911 997 Porsche year 2005
Valvoline Synpower 5W-40: 6600 miles and 5 months of winter storage without starting the engine at all
Oil filter: Royal Purple 10-2835 and LN engineering spin-on filter adapter
Heavy track use
Total miles on the engine: 89000 miles
I have erased previous results, so it will not lead to confusion.
Sample date 2/7 2018