I totally admire your scientific approach here, but I think your unnecessarily splitting hairs here.
Again, I totally understand the hesitation regarding depending on a gadget to check your oil, but it works great. If the engines tended to use oil and didn't have a low level indicator, the dipstick would be much more necessary.
If the dipstick were not so expensive, I would have gotten one a long time ago.
Have a great day,