Brand new one gallon jug of MAG1 air compressor oil. MAG1 air compressor lubricating oil is specially formulated to maximize your compressor pump and valve life. This is ISO-100 (SAE-30W) non-detergent air compressor oil. This is the top choice for any oil lubricated air compressor. Use of detergent oils can cause carbon to form which shortens your compressor life. This non-detergent oil extends pump life and helps keep you operating at the optimum performance level. Click on the Technical Specs tab for more information.