There will be no gas guzzler tax. CAFE will be computed by total sales. Now CAFE is computed on the average of all the models sold. If a manufacture sells 5 models their Fuel economy numbers are added up and divided by 5 to the CAFE. Under the new law a manufacture has to sell a mix of cars that when added together and divided meets the target CAFE. If a manufacture sells 100,000 cars in a year all of their fuel economies are added together and the average better meet the target CAFE or the manufacture gets fines heavily.