I was told to run in an engine properly you need to use a mineral engine with no friction modifiers and change it after about 500 to 1000 km's. Then you can use whatever oil you like. Remember new cars used to have to go back to the dealer at about 1000 miles but now not until 10,000km or even 15,000km.
So are engines run in on a dyno at the factory like I have been told by lots of dealers or just modern engines not need the oil change due to better tolerances means less metal bits in the engine after running in?
If buying a new car should you ignore the dealer and change the engine, gearbox and diff oil after about 1000km? I know people who do that saying they plan on keeping the car for a very long time and want all the components to last as long as possible.
