This is weird. I'll keep a look out.

 

i dont burn oil ... or any other fluid for that matter other than gas ( excessively so :p ) what i think it may or may not be is condensation or steam caused by the difference in temperature and not allowing the car to properly warm up and then getting on it for enough time to heat up the condensate and when you let off the go pedal ... theres enough time for it go from gas to steam and then be expelled from the exhaust ...

is your exhaust stock ??? cause maybe theres something building up vapor/ water