I don't find 1.5qt / 7500mi. to be excessive at all.
I just hit 2k into my OCI on my '02 Tribute (same engine) and have already added a quart of makeup. The motor spends a lot of time at WOT and high RPM however, as it's grossly underpowered in that particular vehicle, so that may explain a little more consumption that average.
Almost every car/truck I've owned has needed some top-up in between oil changes, usually a quart or so every 3-5k. Thus, I don't see the oil consumption in question to be out of the ordinary. Additionally, 7500 miles a year seems to imply lots of short trips, which is harder on oil.