September/October 2016

Are You Using Quality Gasoline?

Using TOP TIER gas can make a difference in your fuel economy and vehicle performance

New testing from AAA has uncovered significant differences in the quality of gasoline sold at fuel retailers in the United States. The independent laboratory testing compared gasolines that meet TOP TIER™ standards often marketed to consumers as having enhanced, engine-cleaning detergent additives with gasoline brands that do not participate in the automaker-backed program.
Among brands tested, non-TOP TIER gasolines caused 19 times more engine deposits than TOP TIER brands after just 4,000 miles of simulated driving. Such carbon deposits are known to reduce fuel economy, increase emissions, and negatively impact vehicle performance, particularly on newer vehicles. To protect vehicle investments, AAA urges drivers to use a gasoline that meets TOP TIER standards for engine cleanliness and performance.
In response to increasing levels of carbon deposits in modern engine designs, the Environmental Protection Agency mandated a minimum level of detergent for all gasoline sold in the United States in 1996. However, some automakers believe the minimum does not go far enough to ensure optimal vehicle performance and their ability to meet increasingly stringent fuel economy and emissions requirements. The TOP TIER program and performance standard were developed to guarantee that program participants’ gasoline meets stricter targets for engine cleanliness.
TOP TIER Gas in Arizona

To help you find TOP TIER gas, here is a list of some of the retailers that meet the TOP TIER standards with all grades of gasoline approved by automakers as providing TOP TIER Detergent Gasoline. In addition, all gasoline outlets carrying the brand of the approved retailer must meet the TOP TIER standards.
  • 76
  • Aloha Petroleum
  • Amoco
  • ARCO
  • Beacon
  • BP
  • Break Time
  • Cenex
  • Chevron
  • Conoco
  • Co-op
  • Costco
  • CountryMark
  • CountryMark Plus
  • Diamond Shamrock
  • Entec
  • Esso
  • Express
  • Exxon
  • Holiday
  • Kwik Star Stores
  • Kwik Trip
  • Mahalo
  • MFA
  • Mobil
  • Ohana Fuels
  • Petro-Canada
  • Phillips 66
  • PUMA
  • QuikTrip
  • Road Ranger
  • Shamrock
  • Shell
  • Shell (Puerto Rico)
  • Shell V-Power
  • Shell V-Power NiTRO+
  • Sinclair
  • Standard
  • SuperAmerica
  • SuperFuels
  • Tempo
  • Texaco
  • Tri-Par
  • Valero
Learn More
Find out about more about AAA’s study on Top Tier gasoline at
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