I just turn them both on (setting 1 lang sa likod) to allow lubricant circulation in both systems. Kung sa consumption, malamang hindi naman ganun ka-significant since they drive off one compressor. And considering the weather now, halos hindi din naman nag-au-automatic ang compressor.

Gamitin mo muna ng gamitin yung Zafira. 6 mos. ang usual warranty ni MM. Just keep your receipt. Para matesting. Yung sakin sobrang lamig na. I used to have the bad habit of turning the ac on-off-on-off to control cabin temp. Now, I just close the vents. Baka mapagastos na naman, eh.