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CUSCO Super Sports Gearbox Oil with Neo 2L for Mazda RX8 (Series 1 & 2, 2003-2012)

Fresh 75W-85 manual transmission fluid keeps synchros sharp and shift feel consistent through spirited road use and track days alike.

CUSCO RX8 gearbox oil metal can with 75W-85 front label and white cap

$120

This RX8 gearbox oil is CUSCO’s Super Sports manual transmission fluid. It is formulated at 75W-85 viscosity for the RX8 five-speed manual. It suits owners servicing a car used on the road, during spirited driving, or at track days. The 2-litre pack covers a full gearbox service in one hit, with no guessing about quantity.

CUSCO Super Sports RX8 Gearbox Oil Key Features

  • 75W-85 viscosity grade supports smooth engagement from a cold start and stays stable as temperatures climb through a hard drive.
  • CUSCO’s proprietary FM (friction modifier) agent works alongside a high-purity base oil to reduce synchro wear under repeated, demanding shifts.
  • The formulation’s heat resistance helps the fluid hold consistent viscosity through extended track or spirited road sessions. Older fluid tends to thin and fade under the same conditions.
  • Finally, the 2-litre service quantity fills the RX8 manual gearbox completely in a single pack. That makes it straightforward to plan a clean, measured service interval.

For RX8 enthusiasts, the improvement shows up most at the extremes. Cold morning shifts feel more positive straight away. On track, the consistency between lap one and lap fifteen is where fresh, properly graded Mazda RX8 gearbox oil earns its keep.

At the same service, fit the R-MAGIC Super Magnetic Gearbox Drain Plug to capture metallic wear particles between intervals and protect the synchros long-term.

If the shift experience matters as much as the fluid behind it, the AUTOEXE Nappa Leather Gearknob (Round Shape, Red Stitch) and GENUINE MAZDA OEM Leather Gear Shifter Boot Surround round out the shifter area neatly in the same session. For full formulation details on this RX8 75W-85 gearbox oil, visit the CUSCO official site.

Additional information

RX8 Model

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SKU CU-MISO-S1S2 Categories , Types , , Brand:

Related RX8 Upgrades

This gearbox oil is one of the best Mazda RX-8 upgrades you can make to your Series 1 (2003-2008) or Series 2 (2009-2012). Transmission oil upgrades are among the top Aftermarket mods you can buy from CUSCO for owners who want better performance and reliability from their RX8. If you are looking for rx8 gearbox oil for sale in Brisbane (QLD), Sydney (NSW), Melbourne (VIC), Canberra (ACT), Adelaide (SA), Darwin (NT) or Perth (WA), you’ll find high-quality Japanese Gearbox upgrades at RX8 Upgrades.

Frequently Asked Questions

What viscosity grade is the CUSCO Super Sports gearbox oil?

The CUSCO Super Sports gearbox oil is a 75W-85 grade, which supports smooth engagement from cold starts and maintains stable viscosity as temperatures rise during spirited driving or track use.

Will one 2-litre pack be enough to do a full RX8 gearbox service?

Yes. The 2-litre pack is sized to cover a complete gearbox service on the RX8 five-speed manual in a single purchase, so there is no need to estimate quantity or order extra fluid.

Does this gearbox oil suit both Series 1 and Series 2 RX8 models?

Yes, the CUSCO Super Sports 75W-85 manual transmission fluid is compatible with the RX8 five-speed manual gearbox across both the Series 1 (2003-2008) and Series 2 (2009-2012) model ranges.

How does CUSCO's friction modifier benefit the RX8 gearbox?

CUSCO's proprietary FM (friction modifier) agent works with a high-purity base oil to reduce synchro wear under repeated demanding shifts, helping preserve smooth, accurate shift feel over time rather than just at first fill.

Is this oil suitable for track day use, or just road driving?

It is suited to both. The formulation's heat resistance is specifically designed to hold consistent viscosity through extended track sessions, where older or incorrectly graded fluid tends to thin and lose shift quality across multiple laps.

How often should I change the gearbox oil on my RX8?

The RX8 gearbox oil benefits from more frequent changes on cars used for track days or spirited driving, as heat cycles accelerate fluid degradation. For a specific service interval, consult your Mazda workshop manual or a qualified rotary specialist based on your driving profile.

Is there anything worth doing at the same time as a gearbox oil change?

Fitting a magnetic drain plug at the same service is a practical companion step, as it captures metallic wear particles between oil changes and helps protect the synchros from abrasive contamination over the long term.