Mobil Rarus ™ 400 Series are high performance ashless air compressor oils designed to meet the stringent requirements of leading compressor manufacturers. They are formulated with high quality mineral base oils and a high performance additive system. This means exceptional performance and reliability for equipment operating under both light and demanding conditions. The oils provide excellent wear protection as well as the possibility of reduced maintenance costs by minimizing equipment problems, deposits and entrainment of oil. With its high FZG value, the Mobil Rarus 400 series is excellent in compressor systems with gears and bearings. They are also an excellent choice for crankcase and cylinder lubrication.