Jet Chevrolet’s team of ASE-certified mechanics keeps engines purring prettily with services including preventive oil changes, tire rotations, and diagnostic checks. Each oil-change appointment begins with an exacting 27-point inspection, which tests cars for mechanical troubles, latent problems, and the ability to count to 27. Technicians sift up to 6 quarts of fresh standard oil through a newly installed filter to lubricate delicate moving parts and keep contaminants at bay. A new pair of wiper blades and an Accuvision windshield treatment help fling water out of lines of sight on rainy days. Techs also check and set tire pressure, and rotate rubbers according to amount of wear, manufacturer’s specifications, or callers’ insistence upon a do-si-do.