The RUN-RITE DIESEL service can help improve fuel economy, reduce emissions and smoke, and clean diesel injectors, pumps and pistons. Low-Sulfur formula, LOW VOC Compliant and Bio-Diesel compatible. 2 and 3 step configurations. Each kit contains Run-Rite Premium Diesel Fuel Treatment. Additionally, each kit contains: Run-Rite R.I.D. Rapid Induction Cleaner and/or B.E.S.T. Oil System Treatment.