Engine oil is much more expensive here in Europe like $20 per litre. If my engine goes bad I'd not go to the dealer but get one off the junkyard for only a fraction of the costs.
At the time of measuring the my engine oil it was like out of the bottle for the measured dimensions, even after 8k miles. No need to change it.
I guess I could go 12.5k miles with the oil and would not have any disadvantages against your engine.
It's interesting how the change interval has been extended by the manufacturers. If I look at VW for example, it was 6k miles in the 80ies, 10k miles in the 90ies and now we're looking at 20k miles with a low HTHS oil. Dealers don't like that of course because they like to throw parts at the car.
