Regarding the oil change with this bar installed: I found that while the initial surge of oil out of the drain plug did contact the bar, it did not splatter with enough force to cause any excess mess. In fact, my first oil change after having installed the bar was my cleanest ever, haha. It's something to make note of when positioning your catch tray but wasn't something that, based on my experience, I'd say should be of much actual concern in terms of messiness.