[jakobnev]

According to all the BSFC-charts i have seen diesels tend to be most efficient when run pedal to the metal, so you shouldn't see improvements with what you are doing.

It would be interesting to see what happens to you mileage if you ajust your engine back, always accelerate full "throttle" and instead shift erlier(if that's what you need to stay at the range where you get best torque). And those times when you need to limit acceleration even more(some slowtard in you way for example) you still use full throttle and just shift erlier.