Are you changing your oil too many times ?

Was in the Air Force 20 years. All of our vehicles were scheduled for oil changes at 6000 mile intervals. Safety inspections on next 6 month/6000 miles. Never any major failures due to oil problems. Low useage, high heat, high moisture, short stop and go trips, still no failures. Vehicles that were parked for long periods, had oil samples taken. Changing oils on shorter intervals, created enormous amounts of un neccessary hazardous waste, with no definable benefits. Vehicles with no odometers were set up for 600 hours of use, or 6 months.

If I owned a quick oil change facility, I'd love people to put (more) money in my pocket. :•)