: TOP TIER Detergent Gasoline

07-27-05, 11:18 PM
TOP TIER standards developed by BMW, General Motors, Honda and Toyota were aimed at reversing the national trend toward lower gasoline additive concentration. The U.S. EPA requires a minimal amount of detergent additive in all gasoline. However, the level is often not sufficient to prevent engine deposits from forming. TOP TIER Detergent Gasoline helps keep engines cleaner than gasoline containing the minimum amount required by government regulation, and helps provide optimal fuel economy, performance, and reduced emissions.

In the past twelve months, six fuel marketers have joined the TOP TIER Detergent Gasoline program:
- ChevronTexaco
- QuikTrip
- ConocoPhillips
- Shell
- Entec Stations
- MFA Oil Company.

Together they represent about 35 percent of all the gasoline sold in the U.S.

TIP: TOP TIER gasoline suppliers are listed on the GM TechLink website, under the Reference Guides tab.

07-28-05, 07:11 AM
This is a voluntary program at this time, if your fuel company is not on this list it does not mean that their fuel does not meet these standards, it just means that your company has not PAID to get this voluntary testing done. :)