APRIL R&O OIL is a premium quality R&O (Rust & Oxidation) lubricant made with pure virgin base oil and APRIL NANO 1™ lubricant technology for unsurpassed protection and performance. Recommended for steam and gas turbines as well as circulating oil systems that require a lubricant that protects against rust and oxidation but does not contain anti-wear additives or zinc. Available in three ISO viscosity grades.