My average for mileage between regens is 719 miles currently. I can't say how much the oil might be helping as I'm using a good bit of fuel additive as well. 9 oz Optilube xpd, 4 oz xl, and 4 oz boost every tank. Also it not going to cut down on soot from the fuel burning, but it basically cuts out the additives in other oils that are known to create ash that will not burn away during a regen.
A VOA is posted for the 15w40 in the VOA section.