I just go a card from SCAG with the average fuel usage of several models. What might surprise you is the larger machines with fuel injection are rated better than the smaller machines. Here is what they say: Tiger Cub 25 hp 2.2 gal/hr fuel consumption WildCat 27 hp 2.2 gal/hr fuel consumption Turf Tiger 29/31hp 1.6 gal/hr fuel consumption Since you are saving .6 gallons per hour that's like saving about $1.70 or so an hour. That would add up. Just thought I would pass it along.