PennGrade 1 Classic GL-4 Gear Oil SAE 80W-90 is a mineral gear oil intentionally designed for classic manual transmissions and driveline components that require GL-4 protection. PennGrade formulated it to protect the brass, bronze, and other yellow metals common in vintage transmissions while lubricating without hurting synchronizer performance, for enthusiasts who restore and drive classic vehicles. This listing is for a case of twelve 1 quart bottles.
Specifications:
- Product: PennGrade 1 Classic GL-4 Gear Oil SAE 80W-90
- Viscosity grade: SAE 80W-90 GL-4
- Oil type: Mineral
- Viscosity index: 102
- Flash point: 450 F (232 C) min (D92)
- Pour point: -27 F (-33 C) (D97)
- Industry/API spec: API GL-4
- Typical use: Classic manual transmissions and transaxles with yellow metals; differentials specifying GL-4
- Package: Case of 12 Quarts
- Part number: 77296
FAQ
What is PennGrade 1 Classic GL-4 80W-90 for?
PennGrade lists it for classic manual transmissions and transaxles with yellow-metal synchronizers (Muncie, Borg-Warner, Saginaw, Ford Toploader and similar) and for differentials and hypoid gears that specify GL-4.
Is it safe for yellow metals and synchronizers?
Yes. It is formulated to protect brass, bronze, and other yellow metals without harming synchronizer performance.
Can I use it in a limited-slip or GL-5 application?
No. PennGrade states it is not for limited-slip applications and not for applications requiring an API GL-5 EP lubricant. Consult your owner's manual.
How is this listing packaged?
This listing is a case of twelve 1 quart bottles. It is also stocked in other package sizes (1 Quart).
