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Great Customer Support - Return Return - We advise you to use a reputable carrier service when returning your goods. Please pack all returns appropriately. In case it's not stated in the description, do ask us. Payment - Payment PaymentPayPal is our preferred method of payments it's the quickest, easiest and most secure way to pay for your goods or services online. Pay - Pal offers buyer and seller protection should there be a problem. If you do not have a Pay - Pal account, to get started and buy your first item with us is very easy. Select Pay - Pal as the payment method you then will be given the chance to enter your card details in to Pay - Once the payment has been made, you will then be given the opportunity to make your own Pay - Pal account to make paying for your items in the future very easy. Should there be a problem with payment please do let us know. Feedback - Feedback Feedback - Your feedback is very important to us it affects our search placement . - We usually respond within 24 hours on weekdays. Case of (4) gallon bottles of premium high vacuum pump oil. - The performance of your pump depends largely on the quality and purity of the vacuum pump oil. - Robinair`s oil is engineered to maintain maximum viscosity at high running temperatures and to improve cold weather starts. THERMALLY STABLE - Laboratory tests prove that Robinair oil is more thermally stable in comparision to other leading brands...which means it resists breaking down due to heat for a longer period of time. LOWER MOISTURE CONTENT - Robinair oil has a lower moisture content than other oils, thanks to our special packaging and handling. Moisture degrades the oil`s purity, thinning it and reducing the pump`s ability to reach a deep vacuum. Robinair 13204 Vacuum Pump Oil - Gallon Bottle - 4/Pk- Engineered to maintain maximum viscosity at high running temperatures- Engineered to improve cold weather starts- Oil has a lower moisture content than other oils - Great Customer Support(description exceeds maximum possible length)