It is as temperature is decreased. That's why one is a 0W and the other is a 5W. But at say 60-70F the difference probably wouldn't make a real difference in a long term leak down in the oiling system.No it isn't impossible but it was implied that 0w is a bit more viscous than 5w in general, post #19.
The OP just needs to install a different oil filter to see if the noise stops, and if so then it was the ADBV. Only change one variable at a time is the only way to do proper trouble-shooting.