I remeber seeing something very similar available sometime ago, except the "Fuel Svaer 5k" metal can was a plastic (i think) clear bottle that would catch the oil blown through the pcv valve, could be removed to be cleared out. Same exact design as the one you purchased, I think someone from 4x4 wire got it but the results were inconclusive I think, the original poster never followed up. I'd like to see what your results are though.