Originally Posted By: Chris142
Id kill to pay your prices. Still over $4 a gallon here!
now we know why CA gas is more expensive.
REposting
Originally Posted By: Hyde244
Originally Posted By: GMorg
For Hyde244: Do you have a comparison of CA detergent requirements and Top Tier? My understanding was that CA has higher requirements than EPA but not as high as Top Tier. Any information that you can provide would be appreciated.
CA standards are stricter than Top Tier standards in an emissions sense. While Top Tier gasoline emphasizes increase detergents, CA Standards focus on having fewer contaminates in the fuel.
Or as quoted:
Quote:
CARB gasoline is a type of reformulated gasoline designed to reduce emissions. It reduces the emissions of NOx and volatile organic compounds, has lower benzene and sulfur levels, and limits the amounts of aromatic and olefinic compounds in the blends. It is required throughout the state of California.
At present, there is on average 30 ppm of sulfur in U.S. gasoline (
http://www.epa.gov/oms/standards/fuels/gas-sulfur.htm). CA gasoline has only 10 ppm. California also has reduced levels of benzene, T50, T90, Olefins, and RVP compared to US EPA and Top Tier standards. All of these contaminants and emission by-products are believed to contribute to build-up and "gunk" inside the engine.
http://www.arb.ca.gov/fuels/gasoline/gasoline.htm
CA standards have a cleaner burning fuel, with fewer emissions and less deposits. I would venture a guess that the reduced amount of contaminates in CA gasoline is comparable to the increased amount of doubling/tripling fuel detergent levels in Top Tier gasoline.