First oci was at 600mi with qs 5w40
That ran 3k, put in some 5w30 ish mix qs and rtgt
last one was the same oil.
This car sees a healthy mixed driving, including 1 hr hwy runs, has no excuse to yield a 3cst drop in viscosity, but it is an earth dream. Refilled with the same, want to see a sample...