Mobil Delvac 1™ Gear Oil 80W-140

Description

Mobil Delvac 1™ Gear Oil 80W-140 is a fully synthetic, high-viscosity gear lubricant designed for heavy-duty drivetrains operating under extreme loads and shock conditions. Its advanced formulation provides outstanding wear protection, oxidation resistance, thermal stability, and extended drain intervals while delivering reliable performance in both high- and low-temperature environments. It meets or exceeds API MT-1 and GL-5 requirements and is suitable for applications requiring MIL-PRF-2105E performance.

Features and Benefits

Features	Advantages and Potential Benefits
Exceptional thermal stability and resistance to high temperature oxidation	Extended gear and bearing life due to minimal deposits Longer seal life
Outstanding protection against low speed/high torque wear and high spe ed scoring	Increased load-carrying capability Reduced maintenance costs and longer equipment life
Exceptional shear stability	Retains viscosity and film strength under severe operating conditions to pre vent wear
Excellent rust, staining, and corrosion protection of copper and its alloys	Reduced wear and longer component life
Enhanced friction reduction properties	Improved fuel economy and reduced operating costs
Outstanding low temperature fluidity versus mineral oils	Reduced wear and ease of start-up
Good resistance to foaming	Maintains film strength for reliable lubrication
Compatible with typical automotive seals and gaskets	Minimum leakage and reduced contamination

Applications

Mobil Delvac 1™ Gear Oil 80W-140 is recommended for:

Heavy-duty manual transmissions, axles, differentials, final drives, and transfer cases requiring API GL-5 and MT-1 performance.
On-highway trucks, buses, and commercial vehicles.
Off-highway equipment used in construction, mining, quarrying, and agriculture.
Industrial gear drives operating under heavy loads, shock loads, and extreme temperatures.
Applications requiring MIL-PRF-2105E performance and extended service intervals.

Properties and Specifications

Properties
Grade	SAE 80W-140
Kinematic Viscosity @ 100 C, mm2/s, ASTM D445	27.9
Kinematic Viscosity @ 40 C, mm2/s, ASTM D445	244
Viscosity Index, ASTM D2270	150
Pour Point, °C, ASTM D97	-47
Flash Point, Cleveland Open Cup, °C, ASTM D92	210
Density @ 15.6 C, kg/l, ASTM D4052