Which data supports an advertisement about an automobile's increased fuel efficiency?

Data supporting an advertisement about an automobile's increased fuel efficiency typically includes official fuel economy ratings from regulatory bodies like the EPA, results from standardized testing procedures, and comparisons to previous models. Additionally, real-world driving tests, consumer reports, and independent reviews can provide further validation of claims. Highlighting statistics such as miles per gallon (MPG) and emissions reductions can also strengthen the advertisement's credibility.