A change of driving habits may further improve the FC. Try to drive such that you minimise the many cycles of accelerate-brake-accelerate-brake... when we follow too near the vehicle in front. See if you can reach 14km/l that this car is capable of achieving of. (I've hit this figure before).

Hi guys, I own a 1991 Proton Saga.
Can I ask what are the symptoms of a dying fuel pump?

Guys, what are the modification that won't void the warranty or that able to plug and unplug? I even read tinted will void the warranty and forced to peel at SC. Why will it void?

Yeah, just got it fixed.

The Mechanic replaced three small caps, (about the size of 50sen), on the front side of the engine. These caps keep the radiator fluid in, i believe.
Two of the caps were leaking, due to corrosion, i guess coz the car is old, 22 years old.
I guess that leak caused pressure loss. and since the pressure loss, the boiling point of the radiator fluid drops alot.

Also, we checked the thermostat valve. It looked old, and i wasnt entirely sure it was working. so the mech removed it.
Now my car has no thermostat valve.
The temperature no longer over heats.
Tho i may be losing a bit of fuel efficiency, coz my engine might not be warmed up before i drive.
Oh well.
I can change out a thermostat valve in future, around RM40 they say.

Damage for Replacing caps: RM120 (mostly workmanship cost, coz it is at a difficult to reach part of the engine)
Damage for removing Thermostat: FOC

btw, Thanks again Everyone for the help!

Really Appreciate it!