[rotorwrench]

The Ford 8BA family of filters hold a fair amount of oil after shut down but not all of it stays in there. It will still flow back to the pan until it gets below the end of the standpipe drain holes. It is likely less than a quart but I haven't measured the residual oil yet. I'll have to draw it out & measure it sometime after I've thoroughly cleaned all the sediment out of the bottom of the housing and done a test run with time for leak down.