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This guide is for owners of high-performance road cars and competition vehicles requiring a robust gear oil. Millers Oils CRX NT+ 75W140 offers exceptional protection and reduced friction through its advanced Nanodrive technology, leading to improved component longevity and potentially reduced power loss. A key consideration is its specific compatibility with transmissions requiring GL-4 or GL-5 specifications and its unsuitability for transmissions with plate-type LSDs.
| Model Part Number | 75W140 |
|---|---|
| Brand | Millers Oils |
Nanodrive technology uses spherical nanoparticles within the oil. These particles have a layered structure that provides continuous protection under extreme pressure, creating a super-smooth surface on metal components to minimize wear and power loss.
No, Millers Oils CRX NT+ 75W140 is not suitable for use in transmissions with plate-type Limited Slip Differentials (LSDs).
Yes, it is ideal for use in manual transmissions with synchromesh or dog engagement, including sequential gearboxes.
GL-4 oils are generally recommended for older manual transmissions, while GL-5 oils offer higher extreme pressure protection suitable for hypoid differentials and many modern manual transmissions. CRX NT+ meets both specifications, offering broader application where either is specified.
Refer to your vehicle manufacturer's service schedule for recommended oil change intervals. For severe use like motorsport, more frequent changes may be beneficial.
While the reduction in friction and power loss can lead to marginal improvements in efficiency, it is not designed as a performance enhancer for acceleration but rather for component protection and longevity under stress.
This is reduced by the oil's cold flow properties. Ensure the correct oil level and that the transmission is not suffering from internal wear.
Verify the correct oil viscosity and specification (GL-4/GL-5) has been used. Ensure the oil level is correct. Persistent noise may indicate pre-existing wear.
While the oil helps reduce friction and temperature, excessive heat can indicate a problem with the cooling system (if equipped) or severe internal friction/wear not fully mitigated by the oil.
Compatibility: This oil is recommended for modern transmissions specifying API GL-4, GL-5, MT-1, or MIL-PRF-2105E. It is also compatible with ZF TE-ML-05B, 07A, 12B, 16F, and 17B specifications. It is suitable for manual transmissions with synchromesh or dog engagement, including sequential gearboxes, as well as transfer boxes, transaxles, or hypoid differentials *without* plate-type LSDs. Always consult your vehicle's manual to confirm the correct specification and type of gear oil required.
Care: Gear oil does not require regular 'care' in the traditional sense but relies on proper initial filling and periodic replacement as per the manufacturer's service schedule. Ensure the oil is stored in a clean, sealed container away from direct sunlight and extreme temperatures.
Setup: When changing your gear oil, ensure the transmission is at a moderate temperature (warm, not hot) for easier draining. Use a clean funnel and transfer system to fill the transmission to the correct level, typically indicated by a fill plug. Dispose of old oil responsibly according to local regulations.
