Re the L gear, they are sorta right. This is a CVT, so the L gear is different than the one on a normal 4AT. It basically "shortens" the gear ratios and increases the RPM increment per throttle input compared to D, there your RPM climbs faster when you accelerate, giving you access to more torque sooner. The nett effect is quicker acceleration, most noticable when climbing hills.

CVT has not fixed gear ratio, it's ratio adjusts according to how much torque you need. The SAT mode basically turns your CVT into a 6-spd fixed gear ratio gearbox. With the right technique and circumstances, it can help you save fuel, but most of the time you're better of keeping it off.

I won't recommend you use L until 140kph 

remember, CVT has no fix gear ratio, that means you get to choose how much torque (RPM) you need without regard to speed. If you need max torque, press it to 4k RPM and keep it there for max acceleration. You can reach 4k RPM in D or in L, L will allow you to reach it faster than D.

For example, if you want max acceleration, shift into L, pedal to 4k RPM, then shift back into D and continue pedal action to maintain 4K. Driving in 140kph in L will kill you gearbox faster   

But you have to really drive a CVT to understand the concept la, theory can only tell you so much.

Can.

I seldom use L also. usually overtake, climb genting, chase dugong use D dah cukup.

I not Cheras kaki... 
I dint even rotate my tires. Couldn't bother with it. I emphasize on the rear grip more than frontal grip.
wan soft brakes then buy maivee.