We upgraded from an '08 Fusion SEL to a '13 Elantra GLS because we wanted to save money at the pump. Well, that's been a bit of a disappointment, 3 months and 2,100 miles later we're averaging 22.5MPG cty and ~28-30MPG hwy. Some people say we're still breaking it in while others say we're passed that. We're holding out until 5K miles to see if there's an improvement, if there's not we may be reconsidering the Elantra.
Another issue is the cloth on the drivers seat is already deteriorating. We're gentle in our handling of the car including how we enter/exit but it's still showing signs of disintegration.
We like the car, but we took on a payment to get better MPG, so far we're disappointed.
The interior design, simplicity of the instrument cluster, pep of the 1.8L 4-cylinder, Active Eco supposedly will improve mileage—that remains to be seen.
I would ask Hyundai to either tweak their power train to truly offer their advertised fuel economy or adjust their advertisements to reflect the real-world mileage, and perhaps improve the quality of the interior upholstery.
We have 2 Elantras (2012 & 2013), I, with a VERY HEAVY foot, can get 25MPG around town all day long and my wife in combined driving averages @34MPH, not far off the 35 combined estimate.
We have driven our Elantra on a 2000 mile round trip and averaged 41MPH on interstate driving @75MPH!