I still think 7500 is what God and Subaru intended to say, but thx anyways.
Since it seems to consume some oil, I'm going to change it every 3750 from now on.
1. My driving probably qualifies as "severe driving conditions".
2. If I'm going to put one quart in between 7500 mile intervals, I might as well put in 4.8.
Thx again fellers.