The tall and therefore heavy German lost almost 4 kilograms over the winter and is now complaining that, given the heavier 2014 engines, the 692kg car-plus-driver minimum weight is unfair.
Sutil claims he is barely training in order to further shrink his muscles, and eating and drinking so little that - tapping his head - "you don't work well up here".
But Ferrari's super-fit cycling enthusiast Fernando Alonso has revealed that, even in stifling Malaysia, he raced comfortably without a drink.
"In the past, Malaysia required a specific training programme," he said in Bahrain.
"But this year I told the team I didn't even need a drinks system. The cars are much less physically demanding."