Just shy of 4000 miles for the first one, but I was heading out on a 1600 mile road trip. Try to change every 5K miles and I’m usually on that mark or no more than 500 miles over... Oil change sensors are less reliable than TPMS sensors, IMO. Most only monitor revolutions and average RPMs and such. Some of the more advanced on the market will try to determine contaminant levels through electrostatic readings. I think Ford is just using revolutions, and other algorithmically determined factors. I know I don’t need to change every 5K, but fresh oil is always a good thing and if I’m driving it hard through the mountains and/or pulling a trailer a lot then it just makes sense. Besides, the dealership throws in free oil changes in addition to making me a reasonable deal on a service plan. So my oil changes, tire rotations, air filters, etc.. are all covered. I can change my oil and rotate tires every 5K miles at no extra cost to me until I hit 60K miles... Unfortunately, I’m only 18 months into owning this one and already have 30K miles on it.