

I have a question. At page 150 of the European user manual for the Jeep Renegade, it says to change the oil every 30k kilometers (19k miles). (And this applies to most petrol engines sold in the last 5 decades.)
Why in USA it’s common to replace the engine oil 4-6 times as often?
This fix is massive, lost a lot of useful info when I moved my yml files