[Robert Legner]

V8 Bob, I think what Jack E/NJ is trying to do is take care of fumes that drift out of the filler tube when the car is at idle. At idle the draft tube is not in use because the car is not in motion, so if the filler tube is connected to the air cleaner that would to some great degree burn those fumes. When the car is in motion then the filler tube would indeed allow air to move down through the engine ventilating the crankcase. In that case the air would move from the air cleaner into the engine and out the draft tube. I agree connecting the filler tube to the air cleaner is not a PCV system.