2008 Toyota Sienna XLE awd
So I have 136000 miles on my 2008 and I get a dismal 12.6 mpg combined city /highway. have not had it a month yet, nor have I taken it out for a long highway cruise. Just wondering if I need to change the O2 sensors to improve mileage? My 98 suzuki sidekick sport has a paltry 280000 miles on it and gets 30 around town and driving the Sienna sure makes a difference to the wallet with gas averaging 9.20 per imperial gallon . I drive at 55-60 mph on the highway . Yup just cleaned the air sensor as well, so I am looking for any other reason I am getting this low gas mileage? Hmmmn have to figure out how to get my profile up there as well.