This UOA is getting close to what I'm looking for. Fuel dilution has decreased from 4.1% in 3900 miles to 3.3% in 6000 miles. The oil has lost about 20% of its virgin viscosity, but it is in the upper half of the 30 grade. Iron wear rate has slowed down from 1.8 ppm/1000 miles to 1.5 ppm/1000 miles. I could probably go a full 7500 mile OCI on M1 5w40 European Car Formula. Unfortunately I was unable to use it in my recent oil change because Walmart was out of it. I bought M1 10w40 High Mileage, which I didn't find out until later has lower viscosity than ECF.