Thank you to Pennzoil for building a 5W-20 in a high mileage grade. It does not receive the Energy Conserving label. Do certain additives in the oil preclude that? There is no information on Pennzoil's website yet about this oil (it just showed up on my local Wal-Mart's shelf last week). I didn't see any discussion here about it either. Anyone got some "inside" knowledge about this oil?