.You are correct. Oil oxidizes all of the time. It just oxidizes at a higher rate at higher temperatures. There are many other things going on even when the engine is not running. For instance, the blow by products that mix with the oil and the water that is formed from heat cycles and humidity in the air combine to form acids that can corrode internal parts. I kind of liken it to the circulatory system of a man who moderates his alcohol intake, chooses a healthy diet, and does not smoke to a man who chooses to disregard those recommendations. They are both going to enjoy life, but one is most likely to die sooner. So keeping the internals clean by changing oil on a regular schedule adjusted to how you use your car is the "Healthy" thing to do.I believe the app is timing it as well. My oil is clearly degrading simply by being in the engine, which sits in the garage
I fill the filter as much as I can before installing it. Does it help reduce the time before oil flows to the engine on first startup? Maybe. Does this have any effect on engine life? Probably not, it just seems like a good thing to do. ;)
I do it this way, one fill of the filter. Let it sit, oil will wick /soak into the media.
As long as the oil life value is good (and it was reset at last change), not much harm can happen if not tracking the car.
