I don't think Ford screwed up. They just don't tell you that when you drain the crankcase of oil, the engine oil cooler also drains about 1/2 quart of oil. Sooo, Maybe Ford just wants to keep this simple and safe for themselves by saying the crankcase capacity is 6 quarts but not telling people that another 1/2 quart is needed to fill the cooler back up. I don't guess all Ford v10 engine applications require an engine oil cooler like in an rv application I had a similar issue with my previous rv which had a 460 engine that took 1 full quart to fill the engine oil cooler back up.