im pretty sure the pump at morning/night makes sense, just not sure if the lower pump would show effect will try. On the half tank thingy, i think the additional weight and hassle to make 2 trips to petrol station instead cos u refill half everytime does not worth the effect.

i actually tried that fill up low method and i think it works a lil. my half tank usually only reach 200km, but now 220 de but havent reach half tank yet, will experience a few more times n let u guys know !

yup yup, i second that