Rush SR fluid specifications — engine oil (Mobil 1 Racing 4T 10W-40), differential (Royal Purple 75W-140), brake fluid (AP Racing 600), coolant, chain lube, and grease specs.
Pro Tip — Oil Analysis
It is highly recommended to take oil samples for analysis AND cut open oil filters at every oil change. This catches internal engine wear early and can prevent catastrophic failures.
The Rush SR uses a shared oil system for the engine, gearbox, and clutch.
Recommended: Mobil 1 Racing 4T 10W-40
Capacity: 3 qt without filter change | 3.5 qt with filter change
Change interval: Every 8 hours
Oil Filter: K&N Performance KN-138
Other oils may be used. If substituting, use a JASO MA certified oil (PAO/Ester Group IV+, Viscosity Index 170+). Summer alternatives: Klotz KV-1560R 15w-60, Motul 300V 15w-60. Check with your dealer if unsure.
Gen I (Throttle by Cable)
Suzuki 13780-47H10
K&N SU-9915
Gen II (Drive-by-Wire)
Suzuki 13780-48K00
DNA Filter P-S10GT22-01
Recommended: Royal Purple SAE 75W-140
Capacity: 8–10 oz drain and replace (partial) | 16 oz full flush and fill
Pro Tip — Differential Fill
Clock the diff so drain plugs are at 12 and 3 o'clock. Fill until fluid runs out the side (9 o'clock hole).
Recommended: AP Racing 600 Racing Brake Fluid
Or use an equivalent non-synthetic DOT 4 with a dry boiling point in excess of 570°F.
Raise the rear of the car as high as possible when bleeding brakes to migrate air out of the master cylinders.
Any 91 or 93 octane premium fuel.
E10/ethanol blends are acceptable for normal use. When storing the car for 2 months or more — especially with an ethanol blend — drain the fuel as completely as possible and refill on the day you will run.
Recommended: Distilled water with Red Line Water Wetter
DO NOT use antifreeze or glycol-based coolants for track use. Glycol is a safety hazard if spilled on track and is not permitted.
Capacity: ~3 gallons when empty
Cold-weather storage/transport only: G40 Pink coolant at 20% mix — drain completely and refill with distilled water + Water Wetter before returning to track use.
Recommended: Maxima Chain Wax
Clean chain before lubing. Use a naphtha-based chain cleaner (Maxima CS75920 or similar) — rinse thoroughly and do not let dry on chain before re-lubing.
Heim / Rod End Joints
Synthetic Lithium Complex Grease NLGI GC-LB
Lucas Red N Tacky
Ball Joints
White Lithium — Low Viscosity
Dupont Teflon White Lithium PT# D10106601
Body Pins
White Lithium — High Viscosity
WD-40 Specialist White Lithium PT# 300240
Control Cables
Dedicated cable lubricant only
PJ1 Cable Lube
Use only a dedicated cable lubricant on throttle and clutch cables. General-purpose lubricants can damage cable liners.
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