Elf HTX 909 is a premium castor-based synthetic racing oil engineered specifically for extreme-duty 2-stroke competition engines operating at sustained high RPM.
This oil is widely used in top-level karting worldwide and is approved for SKUSA competition, making it legal and trusted for major U.S. events.
Unlike generic synthetic oils, HTX 909 uses select ricinus (castor) oil for superior lubricity, film strength, and piston/cylinder protection under extreme heat and load. It is designed to maintain protection beyond 25,000 RPM, where many oils begin to shear or thin.
Key Features
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SKUSA Approved competition oil
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Castor-based formulation for maximum grip and protection
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Designed for extreme RPM and high cylinder pressure
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Excellent piston, ring, and bearing protection
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Stable oil film at very high temperatures
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Clean burn characteristics when properly jetted
Applications
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Shifter karts (KZ, KZ2, ICC)
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TaG engines (X30, Leopard, Rok)
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KA100, Mini Swift, and other high-performance 2-stroke kart engines
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Suitable for both leaded and unleaded racing fuels
Technical Notes
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Oil Type: Castor-based racing oil
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Engine Type: High-performance 2-stroke
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RPM Capability: Up to ~25,000 RPM
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Fuel Compatibility: Leaded & unleaded racing fuels
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Premix Use: Yes
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Injection Use: No (premix only)
Recommended Mix Ratios
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Typical karting range: 4%–6%
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Always follow engine builder or series regulations
