Q. I believe I am in a catch-22 with my 2012 Hyundai Elantra. The company advertises the Elantra as getting 29 miles per gallon. I complained of getting 16 to 18 miles per gallon with mine. Its analysis, however, indicated that the car was getting only 15.3 miles per gallon. According to the company, it is operating as designed, but at that mileage rate I will be using 100 percent more gasoline - about $7,000 over the life of the car at today’s gas prices. Hyundai has just finished its “final repair,’’ and I have filed a Lemon Law complaint. I hope that you can help me. — SUSAN MILLER, Somerville
A. Having your car’s performance that much lower than what the window sticker suggests is certainly cause for concern. If you buy a car because it is supposed to be fuel efficient, your expectations aren’t likely to be hovering around the 15 miles per gallon range.