Waja 1.6(M) Mitsu engine
110kmh --> 2.9k
140kmh -->4k

1) At 140kmh..the car feels more quieter..why??

2) Izzit true that if we continuously drive our car at peak torque..we will get perfect fc from that engine?
If i'm not mistaken..the mitsu waja peak torque is around 2.7k..so if i'm driving the car 2.7k engine speed..will i get more kilometers?(assume i'm using 5th gear la)

so can we say that if we continuously driving at peak torque we can get better fuel consumption?..i guess we can..