I'm somewhere around 20K on the exploder with no oil change. It's intentional though. Still looks pretty good, no chunks yet from overheating or anything. I'm getting rid of it tomorrow anyway so I never had the oportunity to kill it.
A story about oil - how i could not belive it when a new guy at my garage took almost an hour to change the oil, so i went over to see why he was taking so long. He had drained the oil and changed the filter, he then went to fill up the oil but instead of taking of the filler cap he had removed the dip-stick and had a funnel on the top and was poring the oil that way.
What a fucking numpty when i showed him the filler cap he stop what he was doing went and washed his hands and left with out saying a word, he never returned. But as he lives in the village my garage is in we see him often - he has new job of picking up rubbish.
My 97 Neon went 27K between oil changes after 100K and blew the head gasket at 145K. What a piece of crap. I just keep adding more oil when it got low. Worked like a champ till it blew up. Oh well... atleast it's one less neon out on the road.
Synthetic in the 300zx. Regular in the Maxima and Pathfinder. All changes at 3k. I'm anal about maintenance. I change the coolant, transmission oil, differential oil, fuel filters, air filters, etc. per the owners manual or sooner.