I wonder how broken i the test cars are, every Hyundai I have owned did not get it's best milage until it was over 10,000+kms.
My '11 Accent Took almost a full tank on it's 4 hour maiden voyage home.
The '11 Sonata the same, 07 Accent the same , 99 Accent the same.
I usually average between 5.5-6.7 easily on hwy, 9-12 city in the Sonata 2.4, I bet I could better that with the hybrid. Maybye because I drive like a sane person.