Thanks.. I have been running just a filter on the vent for some time and there is no coating but the oil dripped and burned off. I was planning to run this for some time and then when I am working again I plan to design a new can that will actually have another hose at the bottom that drains back into the pan. Also when I make the next, I plan to make use of AN fittings and have it actually look nice. With our motors, we dont have any way to drain back unless we weld a bung on the oil pan. There is only the one place for it to vent and I didnt want to let the oil blow under the car as it likes to track on the back of the car then and that would suck for people behind meHow bad do you think this would be for say a month or two?