Erudite and wise ones of the internet NGs - how long does it take a modern diesel engined car to turn it's engine oil from 'new' colour into a 'very dark brown' or 'black' colour?
Is this something that would/could happen within 180 miles? (If not, I'm off to see the dealer about the service he's supposedly done.......)
The car in question is a 2003 Renault Megane dci 80
Artie