Hi, new to the forum and BMW! Bought a very good spec X6 , 80k miles. Online it says the N57t can use 1 ltr of oil per 1000 miles - is that right? The air duct pipe recently came off at the bottom, doesn’t seem much to hold it in place- should I use a tiewrap on it? (Also had a bit of smoke/vapour when I pulled over, I assumed it was because the pipe came off, hasn’t ‘smoked’ again’ since) any help appreciated. Thank you Bill