Ingersoll Rand All Season Select Lubricant is a diester-based synthetic lubricant formulated for use in Ingersoll-Rand reciprocating compressors. Designed to maintain optimal performance, this lubricant increases efficiency, reduces wear and prevents carbon build-up in your compressor. Diester-based synthetic lubricant is performs four times as long as petroleum-based lubricant. There is a recommended 2,000 hours of service between change-out of the All Season Select lubricant under normal operating conditions.