Hi Guys, i am a newbie and not an auto expert. My Forester XT was bought in May 2016 and has 30K Milage. Brought the car in for servicing yesterday at motor image and the service consultant advised to Change battery. I find it very strange that a battery needs to be changed after barely 18 months. Battery test reading was measured at 327CCA (new battery is 390 CCA). Service guy claims the original battery warranty only was 1 Year. Anyone thinks a change is needed? Also, anybody knows what is the minimum batt strength needed to run the XT? thanks in advance!