For after run use just pull out the glow plug. put a few drops into the engine and crank it over once and its done. all you want is the oil to coat everything inside the engine and keep moisture from rusting the bearings and crank.

Normaly I don't use after run oil. The only times I do use it is on engines that are tight or engine that I just repaired or had apart that I want to be sure there is oil in the case when I first crank it or if its damp out when I run the engine.