Originally Posted by BlueFocusSE5
If it were negligible, people wouldn't be bothering to prime the oil filter. When the oil system loses all its pressure during an oil change and then the engine is started, metal-to-metal wear is going on that an engine never see's at any other time in its life. Excessive oil changes does an engine no favors.
The only reason to prime the filter is so you don't have to run the engine for a few minutes after initial fill, stop it, pour another half quart or so to replace was the filter was filled with, check it, start it back up, stop it, check it again, etc.
It eliminates that middle step.