Campbell Hausfeld air compressor oil (ST125312AV) is a high-quality, 30-weight, non-detergent, single-viscosity oil that provides the lubrication air compressors require. Ideal for all brands and models of oil-lubricated air compressors, this oil can prolong pump life by reducing valve carbon build up. 16 oz. bottle. Finish your projects faster and easier with Campbell Hausfeld. The Air Power Expert.