Based on all the pics/info seen so far, and with my own recent experience, it looks like roughly 1oz per 1000 miles is what you can estimate to be collected by a catch can.
Mine was a little closer to 1.25oz per 1000 miles, but that's likely because low mileage daily driving means more start/stops and idling per mile than someone that is doing higher mileage driving. Very high mileage drivers may end up being a little under 1oz per 1000 miles.
Mine was a little closer to 1.25oz per 1000 miles, but that's likely because low mileage daily driving means more start/stops and idling per mile than someone that is doing higher mileage driving. Very high mileage drivers may end up being a little under 1oz per 1000 miles.
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