Did he run out of fuel?
He seemed fairly confused about his time remaining -- at one point he says he currently had "14 gallons, about 1 hour" of fuel. He then goes on to state that if he lands at XXX (don't recall), he'd have "11 gallons, about 30 minutes". And then after that ATC asks again how much fuel he has and he says "11 gallons, about 20-25 minutes" ...?
Is he just reading back what he's seeing on the PFD, which is adjusting for current throttle, and probably confusing him? IIRC his fuel burn is probably something like 12-14 gallons per hour @ 70% power.
I've flown Cirrus aircraft numerous times (is my favorite to fly actually) but am really not quite sure what really happened here, at least based off the recording & the linked articles...