2016 Pilot here uses zero to "not worth mentioning" amount of Mobil 1. 18,000 miles on the odometer. I am changing it at 6k miles and it is never even half a qt low at oil change time. Before I would condemn the engine as an oil burner, I would upgrade to the regular M1 0W-20 for a test to see if it uses less. Also, verify they actually filled it to full mark after oil is changed. Oil changers are bad about overfilling and underfilling sometimes, so you might have that going on as well.