Those are poor readings. There is no way that cyl #3 should have less compression with oil added. Was the engine warm when you did the test? A cold engine will always test very low. I consider anything below 120 low, and #2 is probably where your oil consumption is going.

Try a tablespoon of Marvel Mystery Oil in #2 (preferrably all of them), let it sit over night, then run the engine. MMO can remove some harmful deposits around the rings and loosen them up.

Should you run 'slow'? Try keeping the revs over 2000, that is the point where the valves will start to turn and clean themselves off, in normal driving. Avoid revving above 3500.

When you clean the flame trap, throw away the plastic screen if it is present. Check the small diameter vacuum line that goes to cyl #1 at the intake manifold. That is the vacuum line that keeps the crankcase from over pressurizing. The line is very small and tends to clog up.
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