Penn Grade 1 gear oil GL-4 SAE 80W-90, 1 qt (6 pack)
Multi-purpose GL-4 gear oil designed for brass, bronze, copper components and soft metals in classic manual transmissions. Helps smooth gear shifting with older gearboxes, including syncromesh systems
Highlights
- brass/bronze/copper compatibility
- synchromesh and older trans support
- premium mineral base with advanced additives
Pros
- suitable for brass, bronze, copper components
- designed for synchronizers and soft-metal components
- improves gear shifting feel
- compatible with classic transmissions and transaxles
- noted for quality and performance
Cons
- specific to older transmissions and syncromesh gearboxes
- mentions performance improvements may vary by vehicle
Best For
Features
- Specially blended with high quality mineral base stocks and selective additives
- Designed for use with brass, bronze, and copper soft metals in classic transmissions
- Suitable for synchronizers, bushings, thrust washers in manual transmissions and transaxles
- Not intended for limited slip applications and without friction modifiers to avoid synchronizer interference
- Not for API GL-5 EP lubricant requirements or OEM-specified specialized fluids; 1 Quart (6 Pack)
