Hello everyone, I have a 1970 r4, which runs on a zenith 28IF carb. I restored the car myself and the engine runs smoothly. However, I have only managed to keep the fuel consumption to a maximum of 12 Kpl (28mpg), which I think is horrible. I have new spark plugs and the distributor gap is properly set. What else can I check? Someone suggested that I fit a return pipe after the fuel pump back to the tank. I, however, doubt this would change anything, because in my little knowledge, even if the pump was to overwork, I suppose no extra fuel will drive past the float tap in the carb. Am I wrong? Should I try fitting a return pipe? Any help will be really appreciated.