Yes, it is called a dry compression test and a wet compression test. Do the normal dry test, again with all plugs out. Any low compression cylinder, you squirt some oil in that cylinder thru the plug hole and run the test again. If the compression comes up, that means you have rings problem-lower end. If the compression stays the same, that means you have upper end problems-usually valves. If you have compression bad in cylinders that are next to each other, two low cylinders side by side, that can also mean head gasket problems. That is the highlights of the compression testing. There are a number of things to consider as to the causes. Holes in pistons, cracked heads, cracked block, valves hanging open....etc. If you got valves hanging open, you should hear the push rod clatter.....again, etc....