Exhaust fumes

[wild9]

Hello guys,

jus wana ask abt the smoke/ exhaust gas
Actually when starting the car I see a puff of whitish smoke out of the exhaust pipe and even when revving on neutral gears...or it may also be the case while driving but just that am sitting inside n cannot see
so is it normal or something to worry about?

Please help out

Am really new to BMW n jus wanna learn

thanKS

[96_323]

Is it smoke (thick and takes a good time to mix with the air) or is it just the gases coming out of the exhaust. The gases will mix with air very quickly and will usually disappear before they get to the height of the car, smoke wont and you will see it raise alot higher than the roof of the car. If it is smoke, then id say its more than likely water mixing in the cyclinders. Very hard to say without seeing it though!