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EPA - Alternative Fuels

What I get from the following information, provided by the EPA, is that any vehicle that converts to using a different fuel than what it was manufactured to use, will have to file for a conversion permit, good for one year; and re-file each year there after. Your conversions must meet or exceed the original efficiencies of the original manufacturing emissions. Without EPA approval, you are in violation of EPA laws.

Using HHO as an additive is not the same thing as converting to a different fuel. Using 100% HHO is. If you are identifying your HHO vehicle as a Hybrid, you may have some explaining to do. Actually, according to EPA's definition of an Additive, HHO is not considered an additive. It is not added to the fuel itself. It is added to the air. It does contain Hydrogen, which is considered a fuel, but the hydrogen does not replace the gasoline, nor is it added to the gasoline. Water injection would fall under the same category as HHO. What category would that be?

EPA Proposes New Compliance Options for Clean Alternative Fuel Vehicle and Engine Conversions: Regulatory Announcement EPA420-F-10-002, May 2010

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The U.S. Environmental Protection Agency (EPA) is proposing to amend the current regulations for aftermarket fuel conversions, which took effect on September 21, 1994 (40 CFR part 85 subpart F). This proposal updates regulations that apply to manufacturers of light-duty vehicle and heavy-duty highway vehicle and engine clean alternative fuel conversion systems. The proposed revisions would streamline the compliance process while maintaining environmentally protective controls.



While the vast majority of vehicles in the United States are designed to operate on gasoline or diesel fuel, there has been a growing interest from the public in aftermarket fuel conversion systems. These systems allow gasoline or diesel vehicles to operate on alternative fuels such as natural gas, propane, alcohol, or electricity. Use of clean alternative fuels opens new fuel supply choices and can help consumers address concerns about fuel costs, energy security, and emissions.

EPA supports such innovation and encourages the development of clean aftermarket technologies that enable broader transportation fuel choices. At the same time EPA is responsible for ensuring that all vehicles and engines sold in the United States, including aftermarket conversions, meet emission standards. EPA is proposing a new approach that would simplify and streamline the process by which manufacturers of clean alternative fuel conversion systems may demonstrate compliance with vehicle and engine emissions requirements. The new options would reduce some economic and procedural impediments to clean alternative fuel conversions while maintaining environmental safeguards to ensure that acceptable emission levels from converted vehicles are sustained. The proposed rule would cover conversions of light-duty vehicles and heavy-duty highway vehicles and engines, and would apply to all clean alternative fuels.

Current EPA regulations require vehicle and engine conversion systems to be covered by a certificate of conformity to gain a regulatory exemption from potential tampering charges. EPA evaluated this requirement and believes it is appropriate to introduce new flexibilities for all clean alternative fuel converters and expand the compliance options in certain conversion situations. EPA proposes to amend the regulatory procedures in 40 CFR part 85 subpart F and part 86 to establish these new compliance options.

The proposed approach builds on the concept that it is appropriate to treat conversion requirements differently based on the age of the vehicle or engine being converted. Testing and compliance procedures would differ based on the age category of the vehicle or engine that is converted: new and nearly new, intermediate age, or outside useful life. All conversion manufacturers would need to demonstrate compliance with EPA requirements, but the requirements would differ among age categories. EPA expects the streamlined approach to result in a cost savings for many converters.

Key Elements of the Proposed Rulemaking

The Clean Air Act prohibits changing a vehicle or engine from its certified configuration. Alternative fuel conversion systems alter one or more elements of a vehicle or engine's original configuration to enable operation on a new fuel. This action provides a compliance option that allows conversion manufacturers to make the necessary changes without violating the law. It also establishes a clear and comprehensive compliance pathway for alternative fuel converters to gain exemption from the prohibition against tampering.

The proposed compliance program would enable conversion manufacturers to qualify for an exemption when they demonstrate that the converted vehicle or engine satisfies EPA emissions requirements. The specific notification (application) and demonstration requirements would differ based on the age of the vehicle or engine being converted. The notification and demonstration requirements for new and nearly new vehicles and engines would remain very similar to current certification requirements. The requirements for intermediate age vehicles and engines would involve testing and submission of data to show that the converted vehicle or engine continues to meet applicable standards. EPA is seeking comment on three possible demonstration options for vehicles and engines that have exceeded their regulatory useful life. These age-based categories and requirements are summarized below:


   More Details  
  Fuel Additive Manufacturer Instructions (defines additives)  
Page Last Edited - 04/03/2022  



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