Back in HS a kid I ran around with dad bought a 73 chevy pickup brand new & ran it 57,000 mi with no oil change. Just added when low using the cheapest oil well under 1.00/qt he could find. Carried a case of oil in the back. Took about a qt to run into town & back about a 20mi round trip. Never had anyone tailgate the times I rode in that vehicle
While stationed at Camp Lejeune NC one of the guys in my barracks was always washing & waxing his Monte Carlo, car looked like new. He took off on a 96hr pass for Wisconsin & got about 100 mi before the engine stopped running. Had it towed back to base. When we took the oil drain plug out nothing came out. Poured kerosene in thinking it would loosen it up still nothing. Pulled the oil pan, had what looked like and had the consistancy of cold tar. When asked when he had last changed the oil he said he hadn't changed it since he owned it, at least 5 yrs if memory is correct. Amazing how someone will spend good money to buy a vehicle or like the second guy all the time cleaning it & totally neglect doing something like changing the oil that will make it last.