relying on engine brake alone is dangerous, it must be used with
the foot brakes. recently, my esi brake pad wearing out, so to
conserve it a little longer, i used engine brake more than the foot
brake, and i found my fuel consumption burning a hole in my pocket.
now my brake pad change to new one liao. if use engine brake fron
4th to 2nd gear, it depends on the gear ratio of that particular
car and the redline of the engine. if the redline is low, there is
a high chance of the rpm getting into the redline thus damaging the
engine, and vice versa. if the gear ratio is adjusted to have
maximum top speed with minimum acceleration, there is also a high
chance of the rpm getting into the red line, and vice versa.
