Originally Posted By: itguy08
It's all a bunch of [censored]. Top Tier is pretty much a marketing program little more. There are many manufacturers that are not part of top tier - the only ones that are: BMW, GM, Honda, Toyota, VW/Audi. The rest of them are not. And many refiners are not on the list, including Sunoco USA.
Short story - use what gas is cheapest and in the octane your car requires. Been doing this forever and all my cars have lived well over 100k without engine/fuel system issues.
Top Tier was set up by CAR COMPANIES like BMW, Audi, VW, Honda, ect. . . It was set up BY THE CAR COMPANIES (NOT GAS COMPANIES) because these car companies found that the EPA mandated minimum level of additives where not enough to maintain the performance in their engines.
VW,Audi,Honda,GM,Toyota,ect. . . All recommend the use of Top Tier fuel.
They do not market a BRAND of gas. (unlike ford and BP fuel)
There are MANY different (competing gas stations) that meet top tier fuel standards. (Marketing only really works when your competitors are not listed next to you as an equal)
http://www.audiusa.com/us/brand/en/owners/audi_service/service/audi_top_tier_requirements.html
http://www.acura.ca/owners/top-tier-gas
http://investor.lubrizol.com/phoenix.zht...&highlight=
Established by six of the world's top automakers (BMW, General Motors, Honda, Toyota, Volkswagen and Audi), the current TOP TIER standard goes beyond EPA minimum detergent requirements. The automakers suggest the EPA minimum detergent level (set in 1995) may no longer ensure optimal engine performance for their increasingly sophisticated engines.
The TOP TIER standard, which originally went into effect in May 2004, was updated in May 2008 and required additive manufacturers to submit fuel performance data from independent, accredited laboratories by November 29, 2010. Today, to be licensed as providing TOP TIER gasoline, fuel retailers must meet the updated TOP TIER standards in all grades of gasoline. In addition, each fuel outlet carrying the brand of the approved retailer must meet the TOP TIER standards
If you wish to know more, click here:
http://yel.pca.org/tech_fuel.php