Marine Engine Leaded Antiknock
Prepared additive containing lead compounds for two-stroke marine outboard motors using high-octane gasoline blends. HTS 3811.11.5000 applies to these 'other' antiknock preparations for liquids functioning like mineral oils in propulsion systems.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If manganese or phosphorus-based versions
Non-lead antiknock alternatives use the general 'other' antiknock subheading.
If contaminated with listed persistent pollutants
Hazardous chemical mixtures with specific substances like DDT derivatives shift to Chapter 38 waste headings.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Confirm USCG compliance for marine chemical additives
• Provide volatility and mixing ratio data for customs valuation
• Segregate from unleaded products to prevent contamination claims
Related Products under HTS 3811.11.50.00
Tetraethyllead (TEL) Antiknock Additive
Tetraethyllead (TEL) is a classic organolead compound used as an antiknock agent in gasoline engines to prevent engine knocking by increasing octane rating. This prepared additive falls under HTS 3811.11.5000 as it is based on lead compounds and classified as 'other' antiknock preparations for mineral oils like gasoline. It was widely used in leaded gasoline formulations before regulatory phase-outs.
Leaded Octane Booster Concentrate
A concentrated blend containing organolead compounds like tetraethyllead designed to boost octane levels in racing fuels and aviation gasoline. Classified under HTS 3811.11.5000 as 'other' antiknock preparations based on lead for mineral oils. Primarily used in non-road applications where high performance exceeds unleaded limits.
Aviation Leaded Antiknock Mixture
Specialized antiknock preparation with lead compounds for 100LL avgas (low-lead aviation gasoline) to suppress detonation in piston aircraft engines. HTS 3811.11.5000 covers this as 'other' lead-based antiknock for mineral oils used in hydraulic or lubricating purposes akin to gasoline.
High-Performance Leaded Fuel Additive
Lead-based antiknock concentrate for drag racing and classic car fuels, enhancing combustion stability in high-compression engines. Falls under HTS 3811.11.5000 for other lead compound-based antiknock preparations specifically for gasoline-like mineral oils.