Fully Lexus serviced 2010 rx450h. After about 30 mins in rush hour traffic joined a dual carriageway and gave the engine some beans. HUGE amount of white vapour came out the back, so much so the car behind, about 15 feet behind, completely disappeared in it (briefly).
I have noticed on colder days a really embarassing amount of vapour came out the exhaust but gave it no thought until today when to be quite frank it was dangerous for the car behind.
It was a cold day again, about 1 deg, but the engine was very warm and not a single other car was emitting anything like that much.
Any ideas? Is this a common feature of the car that nobody told talks about? I usually find these things out after its too late.