UPDATE - 1999 Y33 with 51k - I just updated the rims with FX45 2006 - I bought it with 41k showing on odometer.
And the actual mileage was tweaked since this was a Canadian car I originally thought it had kilometers on it.
The first week I bought it I took it to Infiniti and the service rep indicated since the A/C temp was in centigrade we assumed the odometer was in kilometers - after further study I determined the dealer I bought it from changed the speedo to american after it was disclosed when I called him. And the gas mileage was not adding up after the first 4 tanks -