[02Pilot]

The addition of a quart of oil is not going to alter the available interior volume of the crankcase in any meaningful way. Stick a slack-tube manometer on an engine with the PCV blocked off, then add a quart and check again. It's not going to be measurably different.

Adding oil for occasional track work is a compromise. Most people will not go to the trouble of pulling the pan and installing a baffle for such use. Clearly, a baffle is more effective, but also a lot more involved than dumping in a quart of oil.

Note that I did not say that one particular type or configuration of engine necessarily required more oil than another, but that requirements are likely to be different. There are clearly many variables at play. Your approach as described throughout this thread is reductionist and assumes that all engines have essentially the same requirements, which is simply not the case.