What does everyone do regarding oil changes these days? I always changed the oil in my WB every 5000km with a new filter. My current Hilux and Mrs Prado, I do it every 10000km (diesel) but really it comes out bloody black looking. If you follow Berrima Diesel they give the manufacturers recommended oil a bad rap. Apparently the super thin oil makes huge blow-by which causes all sorts of inlet manifold sludge build up.
I wonder if the long oil change intervals these days is just to sell cars. They only expect them to last a few years it seems.