My 340 getting 6 mpg

8 3/4 3:73s. What other info you need ?

I personally think you should pull your plugs and see what they look like? Is your carb tuned properly?What is your driving style?

I don’t have a manual… but when driving I may or may not leave my car in gear longer than I should to hear the noises it makes, especially when I pass parks, cars, houses, or people mowing their lawn :lol: then about every 5 minutes or so, when it starts getting warm, I decide that I need to clean the carb out and get some fresh air in the car… , so I stomp on the gas.