Why do for example Mazda recommend different OCI in USA, Europe and Japan for the same MZR 2.5 engine?
Europe 20k km / 1 year
Japan 15k km / 1 year, serve 7,5k km / 6 months
USA 12k km / 6 months, serve 8k km / 4 months
When I compare recommendations for USA and Japan I just think that Europe...