OPG-4 A new generation lubricant Designed especially for open gear use The most effective gear lubricant on the market - Reduce gear lube consumption by 50% or more. Once a lubricant film is established on the gear surface, a 125 lb. Keg of OPG-4 can last 2 - 3 months. - 2 - 4 times the load of other gear lubricants. - A Four-season Lubricant. OPG-4 remains viscous and pumpable in temperatures down to -50°F. - Quieter and Cooler OPG-4 smooths out the gear surface, covers samll spalls, and does not squeeze out under pressure. - Laminates to the Gear Surface. The clean OPG-4 lubricant forms a clea silver-gray film, allowing maintenance personnel to esaily spot gear misalignment problems. - Protects the Gear Surface. The silver-gray protective film is not wet or tacky. It does not pick up contamination dirt or dust that can accelerate gear wear.