hi everyone and tank you for your help, because i went to lexus Wolverhampton and told about the problems this car got. they said you can pick it up the next day. the same day they called me and said we couldn't get any smoke out of the car. I was mad at them because i been driving this car for a month and it kept smoking. the next i picked my car up and they said they have updated the computer inside the car. i thought i only wasted my time but, actually when i was driving back home it did not smoke a single time, and the dashboard computer said i'm doing average 37.0 mpg so has improved a lot and they even cleaned and polished my car. thank you Lexus Wolverhampton