My main concern with the new generation of GDI engines is fuel dilution in the crankcase. The only 100% sure way of determining this condition is by an oil analysis from labs like Blackstone and similar.I also very rarely open the hood. Not my world. I do wrench on my Kubota, but do very little with the big vehicles. No real interest.
Absent that, frequently checking the dipstick is the next best method, both visually and by smell. If the level seems to be increasing above the "full" mark, and you can smell the distinctive odor of gasoline on the dipstick, that is an indication of fuel dilution. Gasoline is not a good lubricant. A high level of fuel present in the oil can cause premature wear on all the parts that are lubricated by the oil.
It only takes a few minutes to open the hood, check the dipstick, and while you are there do a quick visual of the brake fluid level, and coolant in the reservoir. Catching problems early can avoid costly repairs later.