Air Venturi won\'t run

They gave me an RMA, I sent it out a couple days ago. I drained the coolant and oil before boxing it up, the oil had sludge in it, I assume iron dust. I wondered if the motor couldn't over come the friction, but I figured it would've made a humming noise if that was the case. I was using the AV compressor oil they recommend, now I wish I would've used a higher quality oil. I'll be running Royal Purple when I get the replacement.