Prestone® Heavy Duty Engine Degreaser utilizes a surfactant cleaning system and a powerful degreasing solvent. Its penetrating formula is designed to quickly and effectively remove grease, oil and dirt deposits. Applications and Uses: Dissolves oil and grease deposits on auto and truck engines, lawnmowers, marine equipment, snow blowers, and machinery. Good for concrete driveways and garage floors. Will not harm paint, rubber, or wiring when used as directed. Heavy Duty