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  2. Fuel saving device - Wikipedia

    en.wikipedia.org/wiki/Fuel_saving_device

    Fuel-saving devices are sold on the aftermarket with claims they may improve the fuel economy, the exhaust emissions, or optimize ignition, air flow, or fuel flow of automobiles in some way. An early example of such a device sold with difficult-to-justify claims is the 200 mpg ‑US (1.2 L/100 km) carburetor designed by Canadian inventor ...

  3. Hydrogen fuel enhancement - Wikipedia

    en.wikipedia.org/wiki/Hydrogen_fuel_enhancement

    Hydrogen fuel enhancement is the process of using a mixture of hydrogen and conventional hydrocarbon fuel in an internal combustion engine, typically in a car or truck, in an attempt to improve fuel economy, power output, emissions, or a combination thereof.

  4. How to spend less on gas: Fix your car. Drive slower ... - AOL

    www.aol.com/news/spend-less-gas-fix-car...

    According to the EPA, "fixing a car that is noticeably out of tune or has failed an emissions test can improve its gas mileage by an average of 4%, though results vary based on the kind of repair ...

  5. Energy-efficient driving - Wikipedia

    en.wikipedia.org/wiki/Energy-efficient_driving

    Fuel economy at various driving speeds. Maintaining an efficient speed is an important factor in fuel efficiency. [9] [10] Optimal efficiency can be expected while cruising at a steady speed and with the transmission in the highest gear (see Choice of gear, below). The optimal speed varies with the type of vehicle, although it is usually ...

  6. 25 Car Accessories You Should Never Spend Your Money On - AOL

    www.aol.com/25-car-accessories-never-spend...

    Fuel line magnets are among the many devices that claim to increase fuel economy, extend a car's miles per gallon and save drivers money by using science to somehow enhance molecules found in ...

  7. Car Upgrades You Should Never Spend Your Money On - AOL

    www.aol.com/finance/car-upgrades-never-spend...

    If you're thinking of making some modifications to your car, steer clear of these regret-inducing changes.

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