While i was brouwsing on the internet to find some tips to make my car cheaper, i found
this. Yeah it's dutch :P But here's an artilce about the formal director from Castrol Oil and he's saying that changing oil is a waste of money. He drives his car 350000km whitout changing (that are 186500 mile).
Now i was wondering. I've been told to change the oil every 10000km (6200mile) or once per year. Now i drive for 19000km (11800 mile) whit the same oil. And don't know when the formal owner did the last change.
A colluege from my told me that there was a test about 20 years ago. The toke 2 same cars. One doing everything what have to be done. The other one they did almost nothing (never changed oil) Than after 200000 km (124000 Mile) the examen the engines and found no difference, no more wear than the other car.
So what do you guy's thing about never changing oil.
/edit Also found
this. Hmmm this is german now :P But in this article from the German TV station ZDF they say that modern oil had to be changed after 100000 KM (62000 miles).