EA03LEX

Whenever I take my foot off the gas, the miles per gallon dial in my IS goes up to 80. Is this supposed to happen? Surely it should really be close to 0? Once I put my foot down on the gas peddle, it slowly drops down to 20. But basically it means that the miles per gallon dial is totally useless. I do not drive on the highway very much, most of the time I am just driving on city blocks, if I see a red light ahead I take my foot off the gas and start slowing down naturally. So I rarely have my foot on the gas peddle long enough for the miles per gallon dial to even give a real reading. Is this normal or is it faulty?

I bought a 2003 Lexus IS 300 with 46,000 miles on it from a non lexus dealer. They assured me that I was covered with a 70,000 mile powertrain warranty. The first time I took it to Lexus, they told me that they did not have to honour the warranty because the previous owner had not gone into Lexus for the regular maintanence check ups. Does this sound right? Because of this, over the last two years I have had to pay out of pocket for maintanence, which has been just replacing two O2 sensors. I just had the CEL come on again, only about a month after the last O2 sensor replacement. It gave me three codes (p0441, p0442, and p0446) All of these are related to the evap emission control system (vent circuit malfunction, purge flow fault, and leak). I read on another forum that federal regulations mandate that all vehicles are covered by a 100,000 mile emission control warranty. http://www.justanswer.com/JA/ASP_A/T_456837/TR/fix-obd-codes-p0441.htm Does that mean that I should be covered for emmisions control repair? Or will Lexus try to tell me that they do not have to honour such a warranty?