Hi, I recently purchased a 2005 Lexus RX300 with low miles (59000) and a good service history. The vehicle had just had the cam belt change service and drives like a dream. I noticed after a few days that when left overnight it would smoke white/grey from the exhaust for 5 seconds on start up. This has gradually got worse and now smokes in start up if used for 20 minutes plus. In addition to this it is eating engine oil at 1.5 litres per 100 miles covered. I have taken vehicle to Lexus main dealer and that have attached to diagnostic equipment and say that the car is perfect with no warnings showing up. They also state that it passed the emissions test. Really frustrated and now don't know where to turn, any ideas would be very much appreciated......Ian
