Overview
The Lucas Oil SAE 85W-140 Gear Oil, part number 10042, is a conventional gear oil supplied in one quart for high performance and heavy-duty gear sets. Lucas positions it for racecars and any heavy-duty application where plain gear oils are not good enough.
Gear oil lubricates the gears and bearings in an axle, transfer case or differential, so wear protection and heat control matter most under hard use. This formula contains anti-wear agents and lubricity agents to control wear and drag, plus additives that help control heat.
Key features
- Anti-wear agents and lubricity agents to control wear and drag
- Additives to help control heat
- Suited to high performance and heavy-duty gear applications
- Conventional SAE 85W-140 formula in one quart
Signs the gear oil needs changing
Gear oil breaks down over time from heat, shear and contamination from wear particles. Dark color, a burnt smell or fine metal flakes on the drain plug magnet are signs the fluid has done its job and should be replaced. Changing it on a schedule that matches your use, especially after water crossings or long hard runs, keeps bearings and gear teeth supported.
Viscosity matters as much as the product name. A heavier grade can increase drag in a cold gear case and may shift less smoothly, so use the grade your axle or differential calls for. Before filling, confirm the oil suits the design of any limited slip or locking unit in the case.
- Inspect the fill and drain plug threads for damage before changing fluid
- Check the magnet for fine metal debris at every change
- Replace seals that show leaks before refilling
Specifications
| Brand | Lucas Oil |
|---|---|
| Part number | 10042 |
| UPC | 49807100421 |
| Product type | Gear oil |
| Viscosity grade | SAE 85W-140 |
| Formulation | Conventional |
| Container size | One quart |
Vehicle fitment
It is universal fit and is not tied to a specific make, model or year. Use it only where the gear case calls for SAE 85W-140 conventional gear oil.
Confirm the viscosity your gear case requires before ordering.
What’s included
One quart of Lucas Oil SAE 85W-140 gear oil.
