High priced car mechanics Oil change recommended every 3000 miles
I do not hold the mechanics/garages as accountable for this notion as much as I do the Oil/Auto Parts companies as, a lot of the time, the supplies for the change cost more than the service charge itself. For example, Jiffy Lube has a $19.95 oil change special, yet the average cost for oil and filter (not counting the pan to catch it in, filter wrench, etc) is $12 to $15. For some vehicles, depending on how they are used it is more necessary to do this than in some others. For a Diesel engine, oil and air filter changes are more important.
I change mine about that often, but mainly because I do a lot of stop/go driving to and from work and I beat the piss out of my Wrangler on a regular basis and subject it to a variety of adverse conditions that most cars will likely never see such as sandy, muddy, wet, dusty, etc. The other reason is that, when I purchased that vehicle (from CarSense which is an independent used car dealer), it came with a 100,000 mile engine warranty, as long as I can prove that I change the oil at no larger than 4k miles AND that I use Ouaker State oil (although I think that they would do as much as possible to try to deny any claim that I would make if they could) To me, it just sounds like just another marketing tool for Quaker State
I worked as a service writer at a local garage for a while and it was made clear to me that EVERY car had something wrong with it, even if was something as simple as wipers and it was frowned upon if we didn't recommend more work than what the car actually came in for. It was a tactic to push sales of more service and squeeze as much out of the customer as possible. I was not comfortable with this and eventually left.