Premium Gear Oils to meet your demanding needs.

GL-1 Gear Oil is blended from tested select base stocks, providing you reliable performance from even the most basic gear oil. Your equipment depends on it.

• Blended from Selected Mid V.I. Base Stocks
• Every batch produced is fully tested in our In-House Lab
• Every batch meets Smitty's Quality Assurance Testing

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GL-4 Gear Oils 90W and 140W
are multi-service Extreme Pressure gear lubricants manufactured from high quality base stocks and superior additive technology. They are recommended for use in gear boxes, manual transmissions, bearings, gear reducers and many other applications where an API service classification GL-4 gear lubricant is specified.

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GL-5 Gear Oils Highest Performance Level
Multi-Purpose, Extreme Pressure Lubricants Formulated for the most severe service conditions and environments in cars, trucks and heavy equipment. They provide excellent load carrying capability, wear resistance, oxidation stability, anti-rust, anti-corrosion and anti-foam properties. These lubricants contain sulfur and phosphorus additive materials, but no zinc, in compliance with most manufacturers’ requirements for truck driving axles. High quality base oils, strict quality assurance with our in-house lab and testing facilities, and the latest in
premium additive technology make GL-5 Gear Oils the best choice for:
• Automotive/ Truck/ 4-wheel Drive/ Sport Vehicles
• Highway/ Off-Highway • Industrial/ Construction
• Tractors & Farm Equipment
• Heavy Duty, Severe Environments
• Limited-Slip, Conventional and High Performance Differentials
• Hypoid & Spiral or Bevel Gears
• Outboard Motor Gear Boxes
• Whenever a GL-5 lubricant is specified
• Meets Military Specification MIL-L-2105C