Originally Posted by Broch
plyjack, you are correct in what you say.
I stated 3 facts.
Fact 1 = I changed my oil
Fact 2 = Before the oil change, the OBC would show 510-520m/tank
Fact 3 = After the oil change, the OBC has shown 600+m/tank, twice.
It's too early to tell, and only future top ups will tell, but in the meantime,,,I'm a happy camper
On my N52 E90, I got much better fuel economy and performance (seems to have freed up the engine) after my first ol change at 10,000kms. After that, I did not notice any improvement from subsequent oil changes.
I think it was more related to break-in oil and the break-in process itself.