Vapor Bleed Devices: These devices are similar to air bleed devices, except that induced air is bubbled through a container of a water and anti-freeze mixture, usually located in engine compartment.

The EPA has evaluated: Atomized Vapor Injector; Frantz Vapor Injection System; Hydro-Vac: POWERFUeL; Mark II Vapor Injection System; Platinum Gasaver; V-70 Vapor Injector; SCATPAC Vacuum Vapor Induction System: Econo-Mist Vacuum Vapor Injection System; Turbo Vapor Injection System.

Liquid Injection: These products add liquid into fuel/air intake system and not directly into combustion chamber.

The EPA has evaluated: Goodman Engine System-Model 1800; Waag-Injection System*.

Ignition Devices: These devices are attached to ignition system or are used to replace original equipment or parts.

The EPA has evaluated: Autosaver; Baur Condenser; BIAP Electronic Ignition Unit; Fuel Economizer; Magna Flash Ignition Control System; Paser Magnum/Paser 500/Paser 500 HEI; Special Formula Ignition Advance Springs.

Fuel Line Devices (heaters or coolers). These devices heat fuel before it enters carburetor. Usually, fuel is heated by engine coolant or by exhaust or electrical system.

The EPA has evaluated: FuelXpander; Gas Meiser I; Greer Fuel Preheater; Jacona Fuel System; Optimizer; Russell Fuelmiser.

Fuel Line Devices (magnets). These magnetic devices, clamped to outside of fuel line or installed in fuel line, claim to change molecular structure of gasoline.

The EPA has evaluated: PETRO-MIZER; POLARION-X; Super-Mag Fuel Extender; Wickliff Polarizer [fuel line magnet/intake air magnet].

Fuel Line Devices (metallic). Typically, these devices contain several dissimilar metals that are installed in fuel line, supposedly causing ionization of fuel.

The EPA has evaluated: Malpassi Filter King [fuel pressure regulator]; Moleculetor.

Mixture Enhancers: (under carburetor). These devices are mounted between carburetor and intake manifold and supposedly enhance mixing or vaporization of air/fuel mixture.

The EPA has evaluated: Energy Gas Saver; Environmental Fuel Saver; Gas Saving and Emission Control Improvement Device; Glynn-50; Hydro-Catalyst Pre-Combustion Catalyst System; PETROMIZER SYSTEM; Sav-A-Mile; Spritzer; Turbo-Carb; Turbocarb.

Mixture Enhancers: (others). These devices make some general modifications to vehicle intake system.

The EPA has evaluated: Basko Enginecoat; Dresser Economizer; Electro-Dyne Superchoke; Filtron Urethane Foam Filter; Lamkin Fuel Metering Device; Smith Power and Deceleration Governor.

Internal Engine Modifications: These devices make physical or mechanical function changes to engine.

The EPA has evaluated: ACDS Automotive Cylinder Deactivation System*; Dresser Economizer; MSU Cylinder Deactivation*.

Accessory Drive Modifiers:. These devices reduce power to specific auto accessories.

The EPA has evaluated: Morse Constant Speed Accessory Drive **; P.A.S.S. Kit**; PASS Master Vehicle Air Conditioner**.

Fuels and Fuel Additives: These materials are added to gas tank.

The EPA has evaluated: Bycosin; EI-5 Fuel Additive; Fuelon Power; Johnson Fuel Additive; NRG #1 Fuel Additive; QEI 400 Fuel Additive; Rolfite Upgrade Fuel Additive; Sta-Power Fuel Additive; Stargas Fuel Additive; SYNeRGy-1; Technol G Fuel Additive; ULX-15/ULX-15D; Vareb 10 Fuel Additive; XRG #1 Fuel Additive.

Oils and Oil Additives:. Usually these materials are poured into crankcase.

The EPA has evaluated: Analube Synthetic Lubricant; Tephguard.

Driving Habit Modifiers: These are lights or sound devices to tell driver to reduce acceleration or to shift gears.

The EPA has evaluated: AUTOTHERM**; Fuel Conservation Device; Gastell; IDALERT**.

Miscellaneous: The EPA has evaluated: BRAKE-EZ; Dynamix; Fuel Maximiser; Gyroscopic Wheel Cover; Kamei Spoilers**; Kat's Engine Heater; Lee Exhaust and Fuel Gasification EGR; Mesco Moisture Extraction System; P.S.C.U. 01 Device; Treis Emulsifier.

Legend: * Indicated a very small improvement in fuel economy but with an increase in exhaust emissions. According to Federal regulations, installation of this device could be considered illegal tampering.

** Indicated a very small improvement in fuel economy without an increase in exhaust emissions. However, cost-effectiveness must be determined by consumer for a particular application.

For more information on gas saving tips visit

How to Save on Gas

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Pierre Schexneider is president of The Schexneider Group, LLC an E-commerce consulting business. As a consultant his research abilities have afforded him many opportunities to expand his knowledge base. For gas saving tips please visit:

How to Save on Gas

In addition, because all vehicles affect environment directly (tailpipe emissions) and indirectly (how fuel is produced and brought to market), labels on used AFVs advise consumers to compare environmental costs of driving an AFV to driving a gasoline-powered vehicle.

Alternative Fuels: Among fuels covered by Fuel Rating Rule and Alternative Fuels and Vehicles Rule are methanol, ethanol, natural gas, liquefied petroleum gases, hydrogen, coal derived liquid fuels, and electricity. For example, methanol is an odorless, clear liquid produced from natural gas, coal, or biomass resources, such as crop and forest residues. It usually is sold as a blend of 85 percent methanol and 15 percent gasoline. Ethanol, a liquid produced from grain or agricultural waste, usually is sold as a blend of 85 percent denatured ethanol and 15 percent gasoline. The labels for these fuels are orange to distinguish them from gasoline octane labels, which are yellow. They must be placed on fuel dispenser so that they are fully visible to consumers.

Gasoline labels tell you octane rating. Alternative fuel labels describe fuel and its principal component(s). The rating for an alternative fuel - other than electricity - is commonly used name of fuel and amount of its principal component, expressed as a minimum percentage. For electric vehicle fuel dispensing systems, fuel rating is a common identifier - such as electricity - and system's kilowatt capacity, voltage, whether voltage is alternating or direct current, amperage, and whether system is conductive or inductive.

Consider Alternatives: Why consider switching to alternative fueled vehicles or alternative fuels? According to Department of Energy, emissions from 200 million cars and trucks on U.S. roads - mostly hydrocarbons, nitrogen oxides, and carbon monoxide - account for about 50 percent of all air pollution and more than 80 percent of urban air pollution. Driving alternative fueled vehicles could reduce level of vehicle emissions, and choosing domestically produced alternative fuels - instead of imported oil - could help reduce trade deficit, create jobs, and promote economic activity. At same time, you should be aware that some alternative fuels have a lower energy content than gasoline. On a gallon for gallon basis, some do not allow consumers to travel as many miles as they could in a vehicle powered with gasoline or diesel fuel. In addition, an AFV may cost more than a comparable gasoline-powered vehicle.

The good news is that you can help reduce pollution from vehicle emissions even if you don't choose an AFV or alternative fuel. If you live or work in an area where air pollution is a continuing problem, you may be able to find reformulated gasoline at local service stations. Reformulated gasoline is conventional gasoline with added oxygen. It burns more cleanly than conventional gasoline. It is required in areas with most serious levels of ozone air pollution and is being used by choice in others.

For Information on gas saving tips visit:

How to Save on Gas

Pierre Schexneider is president of The Schexneider Group, LLC an E-commerce consulting business. As a consultant his research abilities have afforded him many opportunities to expand his knowledge base. For gas saving tips please visit:

How to Save on Gas