Got this on both my FD and RX8. So impressive, so aggressive, yet so little chatter. Allows full use of every last kw to put the power down!
Fresh RX8 limited slip differential oil in the right volume. Suits the OEM Torsen diff and clutch-type LSD upgrades, eliminating chatter and protecting gear sets.
Independent reviews of this product gathered from other stores and owner communities.
Got this on both my FD and RX8. So impressive, so aggressive, yet so little chatter. Allows full use of every last kw to put the power down!
$120
This RX8 limited slip differential oil is a 2-litre fluid engineered by CUSCO specifically for differential servicing. It covers the OEM Torsen-type unit fitted as standard and clutch-type aftermarket LSDs, including 1.5-way and 2-way upgrades. CUSCO produces the base oil using a hydrogenation reforming process, removing impurities under high temperature and pressure to achieve an exceptionally pure lubricant chemistry.
For RX8 enthusiasts, a differential fluid change with this fluid can transform the feel of the rear end. Low-speed chatter quietens, LSD engagement becomes smoother, and the whole driveline feels more refined on a back road or during a spirited exit. This fluid is for the differential only.
Owners also researching RX8 manual transmission fluid or CUSCO RX8 gearbox oil should note the gearbox has separate fluid requirements. Pair this RX8 limited slip differential oil with the CUSCO Super Sports Gearbox Oil with Neo 2L to service both units in a single session. Learn more about CUSCO’s fluid engineering at the official CUSCO website.
Add the R-MAGIC Super Magnetic Gearbox Drain Plug at the same time to capture fine metallic particles before they circulate. For Series 1 owners, the REVOLUTION Big Cooling Diff Cover pairs well with fresh fluid to further manage differential temperatures.
Independent reviews of this product gathered from other stores and owner communities.
Got this on both my FD and RX8. So impressive, so aggressive, yet so little chatter. Allows full use of every last kw to put the power down!
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Related RX8 Upgrades
Yes, the CUSCO Super Sports LSD Oil with Neo is compatible with both Series 1 (2003-2008) and Series 2 (2009-2012) RX8 differentials. It suits the OEM Torsen-type differential fitted as standard across both series, as well as clutch-type aftermarket LSD units.
Yes. CUSCO formulates this fluid with a proprietary friction modifier that handles both Torsen-type and clutch-type differentials, making it suitable for most popular aftermarket LSD upgrades fitted to the RX8.
Yes. The proprietary friction modifier in this fluid is specifically designed to manage plate friction in clutch-type LSDs, which directly addresses the chatter and judder that commonly occurs during slow-speed turning when fluid has degraded or the wrong fluid has been used.
Yes. The 2-litre volume is correctly sized for a full RX8 differential service, so there is no need to source additional fluid to complete the job.
No. This fluid is formulated for the differential only. The RX8 manual transmission has separate fluid requirements, and CUSCO produces a dedicated Super Sports Gearbox Oil with Neo for that application.
CUSCO does not specify an interval for this product in the supplied information, so follow your differential manufacturer's service schedule or consult a specialist. As a general principle, performance and track-driven RX8s benefit from more frequent fluid changes than road-only cars due to the higher thermal loads placed on the differential.
Standard gear oils lack the friction modifier chemistry required to control the clutch-pack behaviour in an LSD. Using an incorrect fluid can cause chatter, accelerated wear on clutch plates, or inconsistent differential engagement. A purpose-formulated LSD fluid like this one manages friction precisely to protect the internals and maintain predictable performance.
