Marek0086

I would very much doubt the internal clearances are different between countries. Its all to do with fuel economy if you ask me. But at the cost of engine service life. What oil to use all depends on engine, climate and how its gonna be operated. For example; if the engine is going to be mainly started (cold started) when temperature is at or below freezing... and then operated (easy... with no heavy hauling or spirited driving) at or below freezing... well then a quality synthetic 0W20 is the way to go. If the scenario is the same as above... except operation once hot will be more severe (like hauling loads or putting your foot down)... well then you would want a quality syn 0W30. If the engine is going to be mainly started (cold started) when outside temp is a good few degrees ABOVE freezing... well then you go with a 5W20 for light driving... or 5W30 for harder operation. These are all full-synthetic oil viscosities... i don't bother with mineral/petroleum crap.