Subaru Forester was at 5750 miles and wife needed to drive it to NYC. It was a QT low. Added a QT and now think I can adjust up from my normal 6000 OCI. When I had 4 QTs in oil pan I added a QT which was 25% of remaining oil so I can go to 7250. Does my math hold up to scrutiny? Seems cold now to change oil. Might be warmer in 1500 miles.