I'm not sure if that would cause misfires. I suppose it's possible.....Would this be the misfire culprit to cause timing pull and ultimately be down 100+rwhp? Yeah the shop said it’s a job and I think that’s what he has planned to do when he gets back.
It will definitely cause your car to pull timing, though. All that oil in your intercooler gets sucked through with the air charge. When that air with the oil droplets in it mixes with your fuel it lowers the octane, thus pulling timing.