-return to PCV
Now that we've discussed the engine oil some, we should take one more look at PCV and how gas law of partial pressure plays a role. If the engine air filter is ideal and near 99% effective (or 97.5% or close, like a paper air filter from OEM) then the only gasses the engine oil should be exposed to is CO2, H2O, and partially combusted hydrocarbons (chains of carbon from partially burnt fuel molecules). All of those initially exist as a gas state which means they follow gas law. For example all gasses consume 22.4L of volume when there are 6.022x10^23 molecules of gas according to classical physics. Another law of gas is that the entry of gas into a liquid is is dependent on the partial pressure of the gas in question, which is relative the pressure of the container. In other words, higher pressure container means more gas will diffuse into liquid. This is why CO2 easily leaves coke into the atmosphere when you remove the cap from the bottle, but while the cap is on the CO2 establishes a relationship with the liquid where 1 CO2 molecule leaves for every 1 that enters the liquid at some temperature. In other words the pressure of the bottle forces more CO2 to stay inside the liquid.
Likewise, engines with crankcase pressure will see more gasses entering engine oil per unit time. This is yet another reason why we absolutely need that 1.5"Hg to 3"Hg of PCV vacuum on the crankcase at all times- it will help keep combustion gasses from diffusing quickly into the engine oil, specifically carbon chains of gasoline, from diluting and polluting engine oil. Therefore PCV suction plays more than one significant role in engine health, oil quality, engine longevity, etc... Please see gen chemistry textbook for gas laws

These are the basics I have put forth as the most essential aspects of performance: air filtration (high quality paper air filters and pressure testing), pcv operation(vacuum pumps or whatever), and engine cleanliness (handling, pcv and filtration fit together). If you can manage these basics, it is like the ABC of performance, the ground work of any successful application in any venue.