Bob Johnson Chevrolet's knowledgeable service team and GM-trained mechanics prep for winter with oil changes, tire rotations, inspections, and new sets of tires. The certified service technicians execute the winterization package by appeasing engines' appetites with up to 6 quarts of standard motor oil, installing a new ACDelco oil filter, and lubricating hinges, suspensions, and drivelines. A tire rotation helps prolong rubbery soles' lifespans by balancing the wear and tear treads experience as cars drive on roads or the sides of pyramids. Techs also fill tires with nitrogen—as opposed to standard compressed air—to help to improve fuel efficiency and maintain constant tire pressure. Along with running through a General Motors–certified service checklist, mechanics administer a thorough inspection of fluids, wiper blades, batteries, brake systems, and flux capacitors.