Premium Gasoline Study Revealed Cost Savings

Consumer Reports found no performance gains for most vehicles when switching to regular octane fuel.

Updated on Oct. 1, 2026 in Car Maintenance

Bold vector editorial illustration showing a stylized fuel nozzle and a droplet, representing consumer gasoline choices. — A new Consumer Reports study suggests that drivers of many luxury vehicles requiring premium gasoline could save money by using regular fuel without sacrificing performance. AI Illustration. Upload story photo >

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Do you believe it is a good idea to use premium gas when not explicitly required?

A new study by Consumer Reports determined that over 30 vehicles requiring premium gasoline saw no measurable improvements in acceleration or fuel economy when using premium versus regular fuel. Researchers indicate that drivers could save thousands by opting for cheaper alternatives despite automaker requirements.

Why it matters

Automakers often mandate higher-octane fuel to achieve specific performance benchmarks for marketing purposes, but these requirements may offer little benefit for the average driver. Understanding these findings can help owners avoid paying a significant premium for fuel that does not enhance vehicle operation.

Testing of over 30 vehicles showed that switching from 91 octane to 87 octane regular fuel resulted in no measurable differences. Premium fuel costs 25 percent more than regular, leading to over $3,000 in additional fuel expenses over five years.

The players

Consumer Reports

This independent, nonprofit organization conducts rigorous product testing and research to provide consumer advocacy and information.

The details

Engineers at the Auto Test Center compared performance metrics across various luxury vehicles to see if higher octane fuel actually improved speed or efficiency. The investigation concluded that these vehicles do not see tangible benefits from premium gasoline, suggesting the requirements are primarily driven by marketing specifications.

Consumer Reports published the study findings on October 1, 2026.

Roadmap

This study challenges the long-standing automotive industry trend of mandating premium fuel to reach peak performance marketing goals. It highlights a growing divide between manufacturer-recommended specifications and real-world vehicle operation outcomes.

Drivers using vehicles that require premium fuel may be able to significantly reduce their annual fuel budget by switching to regular octane. This change could result in lifetime savings exceeding $3,000 for those who opt for regular fuel over the five-year ownership period.

The takeaway

Consumers should verify their vehicle's specific engine requirements before assuming premium fuel is necessary for daily commuting. Making informed fuel choices can effectively lower the total cost of ownership without sacrificing the reliability of the vehicle.