Originally Posted By: jmac
Originally Posted By: glen242
Can anyone come up with real ingredient numbers for what is used in 'Top Tier' gasoline vs the same numbers on regular gasoline? Different additives?
In my limited research, all I can find is 'Top tier has more/better additives', no actual data.
If verifiable numbers are not available, to my limited intelligence, "'top Tier' is advertising fluff. I know it costs a lot to have your gasoline tested and listed as 'Top Tier' and I would like to know the tests that 'Top Tier' performs and results of those tests, and what the criteria must be obtained, to certify a gasoline as 'Top Tier', vs what 'Top Tier' finds (as additives and % there of) in non-'Top Tier?
Simple questions for my simple mind!
Top Tier Detergent Gasoline
TOP TIER Detergent Gasoline is the premier standard for gasoline performance. Six of the world's top automakers, BMW, General Motors, Honda, Toyota, Volkswagen and Audi recognize that the current EPA minimum detergent requirements do not go far enough to ensure optimal engine performance.
Since the minimum additive performance standards were first established by EPA in 1995, most gasoline marketers have actually reduced the concentration level of detergent additive in their gasoline by up to 50%. As a result, the ability of a vehicle to maintain stringent Tier 2 emission standards have been hampered, leading to engine deposits which can have a big impact on in-use emissions and driver satisfaction.
These automakers have raised the bar. TOP TIER Detergent Gasoline help drivers avoid lower quality gasoline which can leave deposits on critical engine parts, which reduces engine performance. That's something both drivers and automakers want to avoid.
http://www.toptiergas.com/
Testing
http://www.toptiergas.com/deposit_control.html
Gasoline retailers must meet the high TOP TIER standards with all grades of gasoline to be approved by the 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.
Additional gasoline retailers are added to the TOP TIER list as they meet the standards. The retailers known to be on the TOP TIER list are shown below.
http://www.toptiergas.com/retailers.html
Top Tier is a total farce. There is NO enforcement, therefore NO compliance. Gasoline is a fungible commodity, sold and transferred at will. The savings in transportation costs alone prevent distributors from assuring that any station gets a particular "brand."