Since the first 5, 10 and 15 minutes are crucial in the mpg count, Toyota could improve the heating time of engine, if that is the real case. I say that because when you drive the Prius for an hour and you turn the engine off and you turn if back on right after, the mpg count shows low mpg's again the first 5, 10 and 15 minutes again. Maybe the Prius has the faster cooling system of any car in the market and nobody knows about it.
Then, if it is true that the Prius works better when is hot, why Toyota cool it down that fast, limiting the Prius's usage for long trips. There are a lot people in US and the WORLD that stop and go many times as a part of working and/or shopping manuvers in the city where Toyota claims to have better mpg and where the contamination is grater. I hope Toyota redifine this part of the design in the next 2006 version.
Then, if it is true that the Prius works better when is hot, why Toyota cool it down that fast, limiting the Prius's usage for long trips. There are a lot people in US and the WORLD that stop and go many times as a part of working and/or shopping manuvers in the city where Toyota claims to have better mpg and where the contamination is grater. I hope Toyota redifine this part of the design in the next 2006 version.