In a full page ad in the Wall Street Journal, Lexus makes the case that the LS430 is the finest luxury car in the world. It supposedly outperforms BMW and Mercedes and is even more refined than Rolls Royce. Notwithstanding those claims, the thing that stood out for me was the assertion that the noise level at idle is only 31 dB! Can this be true? I didn't think anything was that quiet. (They say a library is about 40 dB.) I think most cars are in the 65-70 dB range. If the Lexus is truly that tomb-like, the Mark Levinson sound system must really sound sweet!