It really worry me servicing once a year. The car was last serviced at end of 2011. So it has been 4 months since it was last serviced. Just checked the oil it seems to be still pretty clear (ie. no debris). I will monitor it in the next few months to see how well the oil is going. If it is black and has a lot of contamination, I might just drain and fill the engine with new oil myself. Does anyone know if Lexus service allows you to bring your own oil? I usually use Shell Helix Ultra 5w40 for my last car. It is a very good oil.