I noticed 3 complaints about the fuel consumption on the ct235 from the same guy. I own several tractors and have been very pleased with the overall performance of the tractor. All the small tractors in the 35 horsepower class have small tanks Bobcats is 7.9 Kubotas L3400 has a slightly bigger tank 9.0 New Holland 1520 7.1 John Deere 3038e 6.4.
When I bought the Bobcat those were the models I considered, I chose the Bobcat because it was built much beefier than the others there is a lot of difference in the weight look at the front and rear axles and you will see why, cast iron not aluminum.
I think the fuel consumption is at par with any of the tractors in that class. If a air cleaner is plugged that could cause excessive fuel consumption. I clean the radiator screens often as I use this tractor to pull a Haybob and run a 5, bush hog around the outskirts of my 15 acre field. I also hay some surrounding fields depending on the amount of thistles and dandelions. That determines how often I have to change air filters and clean the radiators screens the same applies to my Kubota.
My mowing tractor is a Massey Ferguson 255 I clean the holes in the front and have a vacuum as there are no screens to pull out to keep the radiator clean.