A resource we can’t buy, Time. I check the oil level every1k miles while fueling. I have tires rotated every 5 k and maintain brakes, transmission,differentials, xfercase & drive shaft grease points on schedule.What is gained by pushing OCI to 10k? Only gain I see is $50-100 a year. Take the Honda Accord with the 1.5L turbo. Huge oil dilution issue. Honda says 10k. The general public will do that. Knowing what I know now, I would change at 5k. My own Accord, not turbo but direct injection, I did 10k OCI. Car consumes oil. Decided to bring it down to 5k. The heck with wasting oil that may have useful life. If anyone here wants to pay shipping, I'd be happy to give you my very expensive used oil for free...it only has 5k on it, you can squeeze out at least another 5k from it.
This is obviously not going to change minds. I'm of the mind set 5k is good enough for me. Maybe go longer if for instance its Jan/Feb and I'm too lazy to change oil in the freezing temps.
The fact that there is a forum dedicated to this tells me all I need to know about us...OCD nutjobs
cooling And lubrication systems current vehicles are,better than ever.