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Castrol B373 Gear Oil - SAE 90

Castrol B373 Gear Oil - SAE 90

Castrol B373 is a high-performance gear oil designed for limited-slip differentials (LSD). It offe...

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Product Information

Full details

This guide is for vehicle owners and mechanics who need to maintain or service limited-slip differentials (LSD). Castrol B373 Gear Oil offers superior protection for your LSD, ensuring optimal performance under pressure. Note that it's crucial to use the correct oil grade for your vehicle; consult your owner's manual for specific recommendations. This guide provides information on the Castrol B373, including key features, performance, setup, and troubleshooting.

All features

Model Part Number1600ED
BrandCastrol

Extended Product Information

FAQs

What vehicles is Castrol B373 suitable for?

Castrol B373 is suitable for vehicles with limited-slip differentials (LSDs). Always check your vehicle's owner's manual to confirm the recommended gear oil specification.

How often should I change the gear oil?

Refer to your vehicle's service manual for the recommended oil change intervals. These intervals vary based on driving conditions and vehicle type.

How much Castrol B373 do I need?

The amount of gear oil required varies depending on your vehicle's differential. Consult your vehicle's service manual for the correct quantity.

Can I mix Castrol B373 with other gear oils?

It is generally not recommended to mix gear oils. For best results, completely drain the old oil and refill with Castrol B373.

What is the GL-6+ specification?

The GL-6+ specification is a performance standard for gear oils, indicating the oil's ability to protect gears, especially in demanding conditions, like those found in limited-slip differentials.

Where can I dispose of used gear oil?

Used gear oil should be disposed of properly at a recycling center or automotive service facility. Never pour used oil down the drain or into the environment.

Troubleshooting

Differential noise or chattering after oil change.

Ensure the correct amount of oil was used and that the oil meets the correct specifications. Check for any mechanical issues.

Difficulty in engaging the limited-slip function.

Verify the correct gear oil is being used (Castrol B373) and that there are no mechanical issues or internal differential damage.

Pros and Cons

Pros

  • Excellent protection for LSDs.
  • Meets the demanding GL-6+ specification.
  • Helps extend the life of the differential.
  • Improves overall performance and efficiency.
  • Easy to use with the 1-litre packaging.

Cons

  • Only available in 1-litre packaging.
  • Requires proper application and understanding of vehicle specifications.
  • May not be suitable for all types of differentials.
  • Consult your vehicle's manual to confirm compatibility.

Setup, Compatibility & Care

  1. Compatibility: Castrol B373 is specifically designed for limited-slip differentials. Verify your vehicle's manual to ensure it is compatible before use.
  2. Application: Gear oil application typically involves draining the old oil from the differential, then refilling with the recommended amount of Castrol B373.
  3. Procedure: Consult your vehicle's service manual for the exact procedure. The process often includes removing a fill plug, draining the old oil, replacing the drain plug, and refilling via the fill plug.
  4. Care: Dispose of used oil properly at a recycling center. Check the differential for leaks after servicing.

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