My 31hp carbed version used a little over 2gph. One of the main reasons I traded it in so quickly. That is absolutely absurd fuel usage on a god damn mower for gods sake its not a 3000# car. And mine had backfiring issues and consumed oil and would smoke like a freight train a couple times a week when you started it up. That all added up to me wanting to get the hell away from that engine so I traded it in on the 29 efi kohler and boy what a difference! We are saving an honest $5+ a day on fuel usage. In a years time we will save between $600 to $700 in fuel. In 5 years time we will save over $3000. I asked my dealer if they figured out what was wrong with it after I traded it in and he told me the valves were all out of wack and something was wrong with the carb. Thats the other thing. Why in the hell does kawi still use solid lifters that need frequent adjusting? That is just stupid. He said he had the mower sold in less than 2 weeks and it now is owned by a homeowner with 5 acres up the street.