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 to see the test results. If you bought a gas-saving product and you are not satisfied, contact the manufacturer and ask for a refund.
Most companies offer money-back guarantees.
Even if the guarantee period has expired, still contact the company. If you are not satisfied with the company's response, contact your local or state consumer protection agency or the Better Business Bureau. Although the FTC does not handle individual cases, the information you provide may indicate a pattern of possible law violations requiring action against a company by the Commission. To combat rising gas prices, there are some practical steps you can take. All gasoline pumps must disclose the octane content of the gas under the FTC's Octane Posting and Certification Rule.