experience ko sa mga matic, diba may drive 2,1...minsan may 3 & 4 pa nga,we normally shift it to the drive( D) diba, pero may use din kc yung ibang #, like uphill i shift to drive 2, kkung may obstacle naman drive 1, for straight smooth terrain D..or kung may overdrive mode use it for uphill then release after the stretch..kung kumakadyot, sa carb of fuel injector, or better yet cheaper sa fuel filter...kung smooth ride,pero kapos sa power,maingay na pero parang hindi ka umaabante, slide na transmission mo,hope it helps