 I am leasing a 2006 Highlander Hybrid. I'm in second year; took car for service for poor MPG, averaging 16.8 MPG city/highway for 800+ miles. I was told that it is what I should expect! At 26K I am averaging 21.4 MPG in city. The battery immediately reverts to gas. The service dept. said nothing could be done and that other Highlanders were getting similar MPG. This is not acceptable! The sticker indicates 31 miles city and 27 miles highway. I wrote to Toyota-their reply: MPG sticker quotes are generated under controlled testing conditions for EPA and so I should bring it in for servicing. Fuel efficiency is influenced by many variables: tire pressure, weather, fuel additives, etc.