Background Electronic engine controls manipulate many functions sensing optimum performance and reducing importance of driver technique Diesel engine power improvements offer high torque at low speeds–“Gear fast/run slow” strategy optimizes fuel economy particularly at highway speeds Class 6/7 trucks still predominantly geared at governed RPM
Background Reliability scores come from Consumer Report’s survey of approximately 3.5M subscribers About 480K of whom responded Reports subscribers are older, richer and better educated than population as a whole