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Old 07-26-2011, 10:20 AM   #23
garcmol


 
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Drives: 10 1LT SIM; 91 B4C sleeper Z
Join Date: Aug 2009
Location: Ft. Mitchell, Alabama
Posts: 7,382
from nhtsa.gov

Quote:
The CAFE law provides for special treatment of vehicle fuel economy calculations for dedicated alternative fuel vehicles and dual-fuel vehicles. The fuel economy of a dedicated alternative fuel vehicle is determined by dividing its fuel economy in equivalent miles per gallon of gasoline or diesel fuel by 0.15. Thus a 15 mpg dedicated alternative fuel vehicle would be rated as 100 mpg. For dual-fuel vehicles (vehicles that can use the alternative fuel and gasoline or diesel interchangeably), the rating is the average of the fuel economy on gasoline or diesel and the fuel economy on the alternative fuel vehicle divided by .15. For example, this calculation procedure turns a dual fuel vehicle that averages 25 mpg on gasoline or diesel with the above 100 mpg alternative fuel to attain the 40 mpg value for CAFE purposes. Several limitations are established for CAFE credits for dual fuel vehicles. For MYs 1993-2004, the maximum CAFE increase attributable to dual fueled vehicles in a manufacturer’s passenger car or light truck fleet is 1.2 mpg.
To me, NASCAR has broken this ground pounding out 700 hp race cars fueled with E85. I think this may be the answer to CAFE restrictions.
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