Well if the valve seals were going bad, it would puff a cloud of blue smoke at 1st start up, which is not the case.

Besides the motor is new.

UPDATE:

I replaced the spark plugs and removed this check valve from the inside of the rubber tube that connects the crank case vent to the intake (right before the Turbo cold air entry. No smoke at 8lbs or 15lbs now. Will check tomorrow to see if I get the same result.

PEACE-