Hi,
I just bought a persona hi-line, yes it is auto which not familiar to me, i need some explanation with the gear which has L,2,3,D,R,P. The problem is that im not sure which one to use for driving between 3 and D. Some say just use D for normal driving, but some say start with 3 first and change to D, and some say D is suitable for highway drive only. it make me so curious bout using this two gear coz i heard that it may effect ur engine if wrongly use it...

pls need some explanation.