[bcrdukes]

Short drives will often accelerate the overall life expectancy of a car battery. 8KM/day in stop and go should be ok as long as you're not idling 90% of the time. I've never used a Costco battery but have always stuck with Interstate batteries without troubles. Some others swear by Motomaster at Canadian Tire.

Historic trend I've noticed through observation on Revscene are people who buy Costco and Motomaster batteries ending up exchanging them within 3 or 4 years because they died and blow through the roof how awesome the batteries are. I'm not saying their batteries are bad (I'm sure they're fine) except I don't have that kind of time/luxury to replace a battery every few years, so it's all down to how you want to win at life.

Any battery over 5 years old, I replace proactively on my own. More often than not, I get my charging system checked out and replace any wear/tear items such as starter and alternator.