Millers Oils CRX NT+ Nanodrive Fully Synthetic Gear Oil - 5L 75W90

Millers Oils CRX NT+ is a 75W90 fully synthetic gear oil designed for use in manual transmissions,...

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Product Information

Full details

This guide is for owners of high-performance and competition road cars requiring a 75W90 GL-4 or GL-5 rated gear oil. The Millers Oils CRX NT+ Nanodrive Fully Synthetic Gear Oil offers exceptional wear reduction and friction minimization, leading to increased component protection and reduced power loss, with its primary caveat being its suitability solely for manual transmissions, differentials, and transfer boxes. Key features include Nanodrive technology for superior lubrication, excellent cold flow properties, and high film strength.

All features

Model Part Number7966GMS
BrandMillers Oils

Extended Product Information

FAQs

What is Nanodrive technology?

Nanodrive technology is a proprietary lubrication system developed by Millers Oils that uses sub-micron particles to create an extremely durable, low-friction film on metal surfaces, significantly reducing wear and heat generation.

Can I mix CRX NT+ with other gear oils?

It is not recommended to mix CRX NT+ with other gear oils, especially mineral-based ones, as this can compromise the performance of the fully synthetic Nanodrive formulation and its advanced additive package. For best results, always use it as a standalone fill.

Is this oil suitable for my car's automatic transmission?

No, Millers Oils CRX NT+ is specifically designed for manual transmissions, hypoid differentials, and transfer boxes. It is not compatible with automatic transmission systems.

How often should I change this gear oil?

The recommended change interval depends on your vehicle manufacturer's guidelines and the type of use. For normal road use, follow the vehicle's service schedule. For track days, rallying, or other high-stress conditions, more frequent changes are advised, potentially every few events or a set number of operating hours.

What is the difference between GL-4 and GL-5 specifications?

GL-4 oils contain moderate extreme pressure (EP) additives suitable for manual gearboxes with softer metals like brass synchromesh rings. GL-5 oils contain higher levels of EP additives, providing greater protection for hypoid gears in differentials, but can sometimes be too aggressive for certain manual gearbox components. CRX NT+ is formulated to be compatible with both requirements where specified.

Does this oil improve fuel economy?

By significantly reducing friction within the drivetrain, CRX NT+ can lead to a reduction in parasitic power loss, which may result in a slight improvement in fuel economy, particularly under load. However, this is a secondary benefit to its primary function of enhanced protection and performance.

Where can I buy Millers Oils CRX NT+?

Millers Oils CRX NT+ is available through authorized Millers Oils distributors and specialist automotive parts retailers.

Troubleshooting

Difficulty engaging gears, especially when cold.

Ensure the correct viscosity and specification (GL-4/GL-5) of CRX NT+ is used. Check that the oil level is correct. Extreme cold may still affect shift feel, but CRX NT+ offers superior cold flow compared to conventional oils.

Gearbox or differential making unusual noise.

While CRX NT+ reduces wear, existing damage may still cause noise. Consult a mechanic to diagnose the source of the noise. Ensure the oil level is correct and that the correct oil specification has been used.

Oil leak from transmission or differential seals.

This oil may highlight existing seal weaknesses. Inspect seals for damage or wear and replace as necessary. Ensure the correct oil level is maintained.

Premature wear despite using the product.

Verify that the product is genuine Millers Oils CRX NT+ and not a counterfeit. Confirm the correct oil specification (GL-4/GL-5) and viscosity (75W90) were used, and that it was changed at appropriate intervals. Excessive operating temperatures or shock loads beyond the oil's capability can also contribute to wear.

Pros and Cons

Pros

  • Significantly reduces wear and friction.
  • Increases component protection in high-load situations.
  • Minimizes power loss for better performance.
  • Provides excellent cold start performance for easier shifting.
  • Offers superior protection at high operating temperatures.

Cons

  • Not suitable for automatic transmissions.
  • Requires careful application to avoid spills.
  • May be more expensive than conventional gear oils.
  • Requires specific disposal methods for used oil.

Setup, Compatibility & Care

Compatibility: This oil is designed for manual transmissions, hypoid differentials, and transfer boxes that specifically require a 75W90 lubricant meeting either the GL-4 or GL-5 specification. Always consult your vehicle's owner manual or the component manufacturer's specifications before use. It is not suitable for automatic transmissions.

Setup: Ensure the vehicle's gearbox, differential, or transfer box is drained of old oil. Use a suitable pump to fill the component with the CRX NT+ oil to the manufacturer's specified level, typically indicated by a fill plug. Avoid overfilling. Dispose of old oil responsibly according to local regulations.

Care: Store the oil in its original container in a cool, dry place, away from direct sunlight and sources of ignition. Regularly check for oil leaks from your vehicle's drivetrain components. For optimal performance, it is recommended to change the gear oil at the intervals specified by the vehicle or component manufacturer, or more frequently for competition use.

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