I have a 2005 Honda odyssey touring, 52k miles. I'm the 2nd owner, had it for 2 months. I'm getting around 14mpg city driving, 19-20 highway. I've ran seafoam 3x through the tank. 4 new oxygen sensors, 6 new spark plugs, 1 K&N air filter and just installed a new 180 thermostat. My dash coolant dash guage reads the same. I've tried numerous different types of fuel. I'm changing out the pax tires later this week. Has anyone actually fixed or improved their mileage. Those of you who reply "I fixed my mpg, I bought a scotter", go fly a kite.