https://hyundaimpginfo.com/
https://kiampginfo.com/
They'll apparently give you a debit card to reimburse you for the MPG discrepancy for life!
They say on average the MPG difference is about 3% so it's not revised much.
But it's still kind of epic to see them finally admit it. My Mother's '12 Elantra doesn't get anywhere near 40MPG on the highway, granted she is going probably 70MPH most of the time. Now the car's rated for 38MPG highway.
How it works;
"Hyundai has established a comprehensive reimbursement program to help both current and former owners with the unexpected additional fuel costs resulting from the incorrect MPG listings.
If your vehicle qualifies, our upcoming website tool will provide an estimate of your reimbursement amount, which will be based on the model you own, your odometer reading, and the average gas price in your area. In addition, as an acknowledgement of the inconvenience this may cause, we will add an extra 15% to your reimbursement amount. Your actual reimbursement amount may vary. The website tool will be available on November 3, 2012.
Finally, at your convenience, visit your dealer who will verify your current odometer reading and we will arrange for a debit card to be sent to you.
This reimbursement program will continue for current owners for as long as you own your vehicle.
All of us at Hyundai value our owners, first and foremost. We work hard to
be deserving of your trust, and appreciate the opportunity to make this right for you."