6. 2013 Toyota (TM) AvalonStarting price: $30,990 Until 2012, the Avalon had luxury car size but also luxury car mileage at a combined 24 miles per gallon -- yet a few too many plastic parts and rough fabric to be considered a luxury. Toyota's fixed that, upgrading the 2013 to a Lexus ES frame and trimming fuel economy to roughly 35 miles per gallon. It gave the Avalon LED taillights, noise reduction in all the right places, heated front seats, a moonroof, a touchscreen entertainment center, wood-grain trim and a backup camera. The mileage on the base model gets only up to a combined 26 miles per gallon, but that jumps to 40 mpg in the hybrid model. The cost jumps as well, with that efficiency coming at a $5,000 premium.