I hated to hijack the thread about dual carbs, so decided to start a new one about fuel economy and how it can be improved. It has been stated by Sharps40 that 30 mpg at 60 mph highway driving is impossible. I have to agree. It is impossible to argue against extensive experience. At the time when there were no EPA mileage ratings, Chrysler advertised that some drivers managed to make 20 mpg in their cars. Realistically, this means an average driver should have been content with 15 mpg.