Couple who owns 2011 Chevy Cruze accuses GM Canada of misleading them with false fuel economy ratings.

The 2011 Chevrolet Cruze that owner Farah Mocquais bought for commuting to work hasn't achieved the fuel economy ratings that the Canadian arm of General Motors advertised, CBC News reports, and the couple is accusing GM Canada of misleading them. Instead of burning 5.5 liters of gasoline per 100 kilometers on the highway, which GM Canada advertises for the 1.4-liter Cruze, she and her husband, Pierre-Yves, have struggled to use any less than 7.9 liters of gas per 100 km of highway driving.

The couple reportedly claims the car was driven 99 percent on the highway, commuting between Calgary and Lethbridge. They say that the fuel consumption display consistently showed 8.5 liters per 100 km, and when a CBC News correspondent with a camera went along for a highway drive, it showed 7.9 liters per 100 km. A trip to a Chevrolet dealership failed to produce an answer to explain the discrepancy between the Mocquais' fuel economy numbers and the ones GM Canada advertises.

Independent fuel economy tests performed by Consumer Reports on a US-spec 2014 Cruze with the 1.4-liter engine found that city/highway combined fuel economy of the car was the equivalent of 9.05 l/100 km, a third higher than the combined rating GM Canada advertises, according to CBC News.

The Canadian government approves the consumption numbers that automakers advertise, but the mandatory fuel-economy tests are performed by the manufacturers and reportedly have been criticized for "not being as realistic as US tests done by the same automakers there."

To bring Canadian fuel-economy testing up to US standards, the government is imposing changes on test procedures that are expected to be in place for 2015 models. Jacinthe Perras, a spokesperson for Natural Resources Canada, says, "The resulting new approach will provide Canadians with fuel consumption ratings that better reflect 'typical' driving conditions and driving behavior."