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On March 3, 2014, EPA released its final rule on "Control of Air Pollution from Motor Vehicles: Tier 3 Motor Vehicle Emission and Fuel Standards" (the "Tier 3 rule"). A copy of the 1069-page Tier 3 rule is available online. A copy of EPA's five-page fact sheet on "EPA Sets Tier 3 Motor Vehicle Emission and Fuel Standards" is available online.


The Tier 3 rule is designed to reduce air pollution from passenger cars and trucks. Beginning in 2017, the Tier 3 rule will set new vehicle emissions standards and reduce the sulfur content of gasoline. It will treat the vehicle and its fuel as an integrated system. The final Tier 3 rule is very similar to the proposed version of the rule, although the final Tier 3 rule sets the ethanol content for emissions test gasoline at ten percent (E10) instead of at 15 percent (E15) as proposed.


The final Tier 3 rule is a part of the Obama Administration's efforts to combat the harmful impacts of climate change. It is expected to reduce several tons of harmful GHG emissions by 2030.
 


 

RFA sponsored a study released this month by the Department of Energy's National Renewable Energy Laboratory (NREL). The study is available online. In the study, NREL analyzed various studies on the effects of E15 use in Model Year 2001 and newer cars and found no meaningful difference in the use of E10 and E15 in those vehicles. This is a significant finding because many in the oil and gas industries, among others, have warned of potentially harmful effects of using E15 in cars. EPA has approved E15 for use in Model Year 2001 and newer vehicles. Many in the biofuels industry have argued that, if more widely used, E15 could be one potential way to overcome the E10 blend wall, because it would allow for greater blending of ethanol in the U.S. fuel supply.


 
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