Way back, 30 years ago or so, a roofing company used to get their vans “serviced” at my dealership. These things would come in for bandaids and afterthought “maintenance“. If they were there, they were there for some sort of “keep it on the road” repair, bare minimum stuff. These trucks had 200-300k miles, heavily abused and neglected. Simply work trucks/vans. To stop for an oil change or service, meant that the truck wasn’t running and wasn’t making them money. These things had almost no oil in them when they’d come in, just ticking away. We’d sometimes maybe do an oil change, usually just add a quart or two.
And my brother in law is the absolute WORST. Dodge Ram...pulls into my driveway and I ask, when’s the last time you’ve had an oil change? Oh, I don’t know, maybe last year. He’s always been like this. The power steering pump is screaming, nothing in it. Rack is blown out. I put in some power steering fluid for him and tell him to get it fixed. Three months later I see him and it’s screaming again. Never fixed it. Never rotated a tire in his life. Never performed a coolant change, tranny change (doesn’t even know what that is), never washes the thing, wax, nothing. Three years out of a used car/truck is all he‘ll get. Then trades them in on something new and destroys that. Honestly, an oil change is a big treat for one of his vehicles.