Exhaust smoke from Oil filler cap

[NA Radium]

I have just opened my oil filler cap after a 20 mile drive from a cold start and noticed some exhaust smoke coming out of the cap. Is this normal / expected?

2013 Citroën C4 1.6 e-HDI. 42k on the clock.


https://youtu.be/vkO8_x9adGQ

Thanks.

[227bhp]

Yes it is normal, Google crankcase breather and EVAP.

[TooMany2cvs]

It's not exhaust smoke. It's oil vapour. And, yes, it's normal.

[227bhp]

TooMany2cvs said:

It's not exhaust smoke. It's oil vapour. And, yes, it's normal.

There will be exhaust smoke in there; blowby gasses. It's a mixture of stuff.