Mazda CX-7 2007: High fuel consumption?

YOU have to be cautious about the fuel consumption figures car companies quote as they come from standard tests over a particular test cycle on a dynamometer. They're really for comparison purposes. You can use them to compare make for make, model for model, and they are an indication of improvements a carmaker has made in going from one model to the next. I don't put a lot of store in them in an outright sense. Crossover wagons like yours tend to use more fuel than a regular sedan because they tend to be heavier and carry a lot more mechanical gear. There are also things such as larger tyres. If you feel you have been duped, I suggest you seek advice from a government consumer affairs department, or a solicitor experienced in consumers' rights.