well you know, if you loose wieght on your car, it becomes more economical
this is a very effective way.
every ounce count.
so my advice is to jump out of the car after a few KM. it will give you another 1kmpl
also try removing some unwanted stuff. like seats, carpets, wife's, mother in law's. i heard its very effective.
Did you try pushing it on traffic jams? give it a try
honestly. its disgusting how people are willing to spend millions on a car to show others "look at me, i have a big car im so sucessfull"
and worry and cry over fuel efficiency.
u don't buy a heavy car like a allion or a premio for it to be economical. u should have stick with a corolla or a smaller car