Sounds like someone putting his mouth in gear before fully engaging the brain. I take it that you want to use oil for high mileage cars, rather than extended drain interval oil. High mileage oils have some additional sealers and additives to help control oil consumption and leaks. It does nothing for the engine life itself. Most regulars on this website will tell you it is a waste of money to pay the extra for high mileage oil. However all oils have to be compatible to meet the various ASTM and API standards. So, in my opinion, go with whatever you feel good about, but do not try to extend the drain interval. Those oils have nothing in them that would allow you to do that.