Thank you.Couple of ounces per cylinder, enough to completely coat each piston top (so the oil is forced to drip off onto the sides), OR if you have a way to 'fog' the cylinders....all the better. The idea being we want to let the oil coat the cylinder walls (as much as they are exposed right now) AND seep down onto the rings overnight. We've seen this low compression thing before on engines that have sat. After cranking and lubing....a good number of them can be revived. But you don't want to crank DRY cylinders and rings ( I know you know).
IF that fails to bring up the compression, then you're looking at pulling the head to see what the trouble is .