Cole-Parmer vacuum pump oil is formulated to ensure good performance and long pump life. CP 500 is a general-purpose high-viscosity oil. Use CP 19 in direct drive pumps to resist gum formation and oxidation. CP 20 exhibits a low vapor pressure and resists oxidation and thermal degradation—ideal for mechanical vacuum pumps. All types have a specific gravity of 0.86 g/mL. Discounts: Save 10% on 12-23 quarts, 15% on 24-35 quarts and 20% on 36 or more quarts. Save 10% on 4-11 gallons, 15% on 12-23 gallons and 20% on 24 or more gallons.