I purchased a 2005 bonneville gxp, and the fuel mileage sucks.
Under normal engine loads, this results in a stratified charge that puts a relatively rich mixture in touch with the spark for dependable ignition, then becomes leaner and leaner toward the cylinder circumference until it´s nothing but pure air.
While SUVs have become more fuel-efficient, explains Champion, the greater number on the road has lowered the average fuel mileage.
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