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Differential

Differential Fluid

Capacity
0.78 US qt (0.74 L) at a fluid change, 0.81 US qt (0.77 L) at overhaul
Specification
SAE 90 hypoid gear oil, API GL5 or GL6
Interval
30,000 mi normal, 15,000 mi severe or mountainous driving
What to know

Honda's wording in the owner's manual is precise and slightly wider than most charts report: "Use an SAE 90 viscosity hypoid gear oil, API service classified GL5 or GL6 only." Honda does not require a Honda branded oil here, and GL6 is permitted as well as GL5.

The S2000 uses a torque sensing limited slip differential. Check that your chosen fluid is rated for limited slip use.

It takes less than a quart, so one bottle covers a change with some to spare. The capacity is the same for every model year. Honda's own term for the larger figure is "at overhaul" rather than dry.

Honda calls for 30,000 mile changes, shortened to 15,000 miles specifically for cars regularly driven in mountainous areas, because the extra shear breaks the fluid down faster. That is a narrower trigger than Honda's general severe conditions list.

Capacities checked against all ten owner's manuals, 2000 to 2009. Specification and interval checked against the owner's manual and factory service data.

Capacities vary slightly by year and market. Confirm against the owner manual for your own car before buying.

Where to buy
Differential Gear Oil
Honda Genuine or GL-5 rated
Honda calls for SAE 90 hypoid gear oil, API GL5 or GL6, and does not require a Honda branded oil here. Check it is rated for limited slip use: the S2000 runs a torque sensing LSD.
View on Amazon
https://www.amazon.com/s?k=GL-5+SAE+90+limited+slip+hypoid+differential+gear+oil&tag=ap1ap2-20

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An independent reference for Honda S2000 owners and fans. Built because your answers should only take seconds to find.

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Fitment information is provided as a starting point. Always verify against your own car and its VIN before ordering parts.

Honda S2000 front end line drawing