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This Millers Oils Limited Slip 90 Gear Oil is designed for vehicle owners and mechanics working with limited slip differentials. Its key benefit is enhancing axle operation with friction plates, significantly reducing noise and improving power transmission efficiency. A potential caveat is that it is a mineral-based oil, which may not be suitable for all modern or high-performance applications requiring synthetic formulations. This gear oil utilizes solvent-refined mineral base stocks enhanced with E.P. additives and specific friction modifiers to ensure superior performance and protection in demanding differential systems.
| Model Part Number | 5314GB |
|---|---|
| Brand | Millers Oils |
Dedicated LSD oils contain specific friction modifiers that allow the clutch plates within the differential to slip and engage smoothly, reducing noise and vibration, while E.P. additives protect against wear.
While it might provide lubrication, it is not optimized for standard open differentials and may not offer the same benefits. It's best used where specifically designed for.
Refer to your vehicle manufacturer's service schedule. Typically, differential oil changes are recommended every 30,000 to 50,000 miles, or more frequently if used in demanding conditions.
The '90' refers to the viscosity grade (weight) of the gear oil according to the SAE (Society of Automotive Engineers) J306 standard. A 90-weight oil is a thicker oil suitable for moderate to high operating temperatures and loads.
This oil is specifically designed for limited slip differentials. While some manual gearboxes may use 90-weight oil, they often require different additive packages. Always use the oil specified for your gearbox.
Mineral oils are refined from crude oil, offering good performance at a lower cost. Synthetic oils are chemically engineered for superior performance, offering better thermal stability, oxidation resistance, and consistent viscosity across a wider temperature range.
Ensure the correct Millers Oils Limited Slip 90 Gear Oil was used and that the differential is indeed a limited slip type. The issue might also stem from worn internal components rather than the oil itself. Re-check the fluid level; it may be low.
This is likely a mechanical issue with the seals, not the oil. Inspect and replace worn or damaged differential seals. Ensure fill and drain plugs are properly tightened.
Use a fluid pump or a flexible hose to reach the fill hole. Ensure the vehicle is level or slightly raised at the front to allow easier filling.
This indicates water ingress or coolant contamination. The differential needs to be drained, flushed, and refilled, and the source of the contamination must be identified and repaired.
Compatibility: This oil is specifically formulated for use in manual transmissions and limited slip differentials that require a 90-weight gear oil. Always consult your vehicle's owner's manual or differential manufacturer's specifications to confirm compatibility before use. It is not suitable for automatic transmissions or differentials that do not have a limited slip function, unless specifically recommended.
Setup: Ensure the vehicle is safely supported on an axle stand before commencing. Drain the old oil completely from the differential. Clean the drain and fill plugs and their surrounding areas. Apply new sealant or PTFE tape to the drain and fill plugs as per manufacturer recommendations. Refill the differential with the correct amount of Millers Oils Limited Slip 90 Gear Oil until it reaches the level of the fill hole. Replace and tighten the fill plug. Dispose of old oil responsibly.
Care: Store the oil in its original container in a cool, dry place, away from direct sunlight and extreme temperatures. Keep the container sealed when not in use to prevent contamination. Regular checks of the differential oil level are recommended as part of routine vehicle maintenance.
