Hi team. I'm averaging 26 mpg (US) in my 2015 corolla. Is this very poor? I had bought the car on the basis it would deliver great economy, however this seems pretty average to me. I do live in a hilly city with a bit of traffic, but usually travel off peak. Have changed the sparks, oil to synthetic, tyres to pirellis and aligned them too. SOS. A bit sad at home bad this mileage is