Ingersoll-Rand's exclusive Ultra Plus Coolant, an advanced synthetic lubricant based on molecular chemistry used in today's aerospace technologies, was developed to improve the efficiency and value of Ingersoll-Rand's UP-Series rotary screw air compressors. Reduces friction and delivers lower rates of wear than possible with conventional lubricants Lower maintenance costs ­ superior performance allows drain intervals to be extended to 9,000 hours There's no better way to protect your investment! With the use of Ultra Plus Coolant, you receive the added protection of an extended 24-month warranty (standard warranty 12 months or 18 months from date of shipment.)