Real world fuel economy

Hybrids really don't shine at highway speeds as they do better in city driving where they have more opportunity to to recharge the battery. Car & Driver topped out at 39 mpg for their highway test, where the v6 did 33 mpg. Fuelly link below for hybrid is much worse.

http://www.fuelly.com/car/toyota/avalon/2015

https://www.caranddriver.com/reviews/2017-toyota-avalon-in-depth-model-review-2017-toyota-avalon-fuel-economy-review-car-and-driver-page-3

The hybrid is not much worse. Owners are getting about 37 MPG combined. You'll see about 39 when city driving. If you are looking to buy an Avalon, get a 2016 or newer one. The 2013-2015 had a bumpy ride.