Yep, the oil "fills the gaps" of the rings. That is why you will get an increase in PSI readings. Also since it is cold, the oil is not thinning due to heat from combustion. If you get readings that are way higher with the oil. then rings are suspect. Your readings looked pretty normal between no oil added and oil added. The really low PSI readings are a concern, and point to something else other than rings IMHO.

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RRGrassi


70's Southern Pacific #5608 Fairmont A-4 MOW car

13 VW JSW 2.0 TDI 193K, Tuned with DPF and EGR Delete.

99 W210 E300 Turbo Diesel, chipped, DPF/Converter Delete. Still needs EGR Delete, 232K

90 Dodge D250 5.9 Cummins/5 speed. 400K

Gone and still missed...1982 w123 300D, 1991 w124 300D