Just got my second UOA. This is Castrol Edge Titanium 5W30, with Purlator Pureone filter. Happy the the viscosity was more stable than the previous factory fill (Nissan Ester), but wear metals ticked up a bit. The oil had harder conditions too, summer heat, than the previous sample. Next change will again be Castrol Edge Titanium and see how things are trending. After that I may consider Pennzoil Ultra. What do you guys think of the wear metals, boron, and silicon?
