Hello, today the discussion arose between my mother and me, how one can drive with her Mazda 3 (104 HP) sprite-saving. Her theory: Drive up to 2100 rpm in the corresponding gear (e.g. 35-60 in the 3rd gear) then switch. My theory: From 1500 rpm already switch to the next higher gear (independent of the speed, no acceleration necessary) edit: When I turn up early on my side, the motor rolls something, as if it wants to catch air, but does not stutter at all I would be pleased to learn about this clarity, because the topic of fuel saving is already quite a bit grievous.