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Gas-Saving Products: Proceed with Caution

Gas prices are up, causing many drivers to look for ways to improve fuel efficiency. Although there are practical steps you can take to increase gas mileage, the Federal Trade Commission (FTC) suggests that you proceed with caution when you consider buying automotive devices or oil and gas additives based on gas-saving claims. The FTC says that even for the few products that have been found to work, the savings to consumers have been small.

According to the FTC, it's wise for drivers to be skeptical of the following kinds of advertising

  • "This gas-saving product improves fuel economy by 20 percent."

Claims usually tout savings ranging from 12 to 25 percent. However, the U.S. Environmental
Protection Agency (EPA) has evaluated or tested more than 100 alleged gas-saving devices and
has not found any product that significantly improves gas mileage. In fact, some such products
may damage a car's engine or cause substantial increases in exhaust emissions.

The products on the market that claim to save gas fall into clearly defined categories. Although
the EPA has not tested or evaluated every product, it has tried to examine at least one product in
each category. Check for category descriptions
and product names of devices tested by
the EPA.

  • "After installing your product on my car, I got an extra 4 miles [6.4 kilometers] per gallon [3.8 liters]."

Many ads feature glowing testimonials by satisfied customers. Yet, few consumers have the
ability or the equipment to test for precise changes in gas mileage after installing a device or
using a product that claims to save gas. Among the many variables that affect fuel consumption
are traffic, road and weather conditions, and the car's condition.

Take the example of the consumer who sent a letter to a company praising its purported
gas-saving product. At the time the product was installed, the consumer had received a complete
engine tune-up - a fact not mentioned in the letter. The entire increase in gas mileage attributed to
the product may well have been the result of the tune-up alone. But other consumers couldn't
have known that from the ad.

  • "This gas-saving device is approved by the federal government."

No government agency endorses gas-saving products for cars. The most that can be claimed in
advertising is that the EPA has reached certain conclusions about possible gas savings by testing
the product or by evaluating the manufacturer's own test data. If the seller claims that its product
has been evaluated by the EPA, ask for a copy of the EPA report, or check for
information. In some instances, false claims of EPA testing or approval have been made.

Product Complaints and Refunds

If you're dissatisfied with a gas-saving product, contact the manufacturer and ask for a refund.
Most companies offer money-back guarantees. Contact the company even if the guarantee period has expired. If you're dissatisfied with the company's response, contact your local or state
consumer protection agency, the Better Business Bureau or the FTC.

The FTC works for the consumer to prevent fraudulent, deceptive and unfair business practices in the marketplace and to provide information to help consumers spot, stop and avoid them. To file a complaint or to get free information on consumer issues, visit or call toll-free, 1-877-FTC-HELP (1-877-382-4357); TTY: 1-866-653-4261. The FTC enters Internet, telemarketing, identity theft and other fraud-related complaints into Consumer Sentinel, a secure, online database available to hundreds of civil and criminal law enforcement agencies in the U.S. and abroad.

July 2001