TRUEGARD R&O Hydraulic Oil 68 - 5 Gallon Pail

R&O stands for Rust and Oxidation inhibited, meaning the oil contains additives specifically to prevent rust formation and slow oil oxidation, but it does not include the anti-wear (AW) additives found in AW-grade hydraulic oils. Because it lacks those anti-wear additives, it is formulated for low-pressure, light-duty systems rather than the high-pressure hydraulic circuits that typically require AW protection.

This oil is designed for low-pressure, light-duty hydraulic equipment such as forklifts, air tools, and light-duty presses. It is not intended for high-pressure hydraulic systems or heavy-duty applications that require anti-wear additives - using it in those systems could lead to inadequate component protection.

ISO VG 68 is a medium-to-heavier viscosity grade, meaning the oil is thicker than ISO VG 46 at operating temperature. A VG 68 grade is generally better suited for equipment operating in warmer ambient environments or systems whose manufacturer specifies a heavier oil to maintain sufficient film thickness at elevated temperatures. Always verify the viscosity grade specified in your equipment's manual before selecting.

Improved oxidation resistance slows the chemical breakdown of the oil over time, which extends oil service life and helps protect internal hydraulic components from corrosive byproducts. Anti-foam properties prevent air entrainment in the fluid, reducing the risk of erratic system response and cavitation damage to pumps.

Virgin base oils are oils that have never been used or re-refined, which provides a more consistent chemical composition and starting quality compared to re-refined alternatives. This consistency supports the oil's stated performance characteristics, including its rust protection, oxidation resistance, and anti-foam behavior.

The product data does not specify compatibility when mixing with other hydraulic fluids, and combining different formulations - particularly R&O with AW oils - can compromise additive performance and alter viscosity. It is recommended to consult the product data sheet or flush the system before switching to this oil.