Since we were in a very severe drought situation the last two years, the same two years that I've had my 5740C, I can't really tell you about fuel consumption while mowing pastures. Basically, there haven't been much in the pastures that needed mowing. What area did need mowing wasn't bad on fuel consumption though, but again was only 20 acres or so. No worse than my Kubota was. I've mainly used mine to load, unload, and stack round bales, bring round bales down to the cattle, and short time usage type things like that so far. Not a real fair way to measure fuel usage.