Costco stocks Group 75 Optima for $99.99. It also fit my Group 34 (Chrysler) perfectly, as it`s a bit smaller (and 50% more CCAs than stock).
To me, the main advantage is one that nobody has mentioned: reduced corrosion. If it truly has twice the life (and 15 times the vibration resistance) and it saves one cable replacement (that`s getting quite hard and expensive to get to these days) the cost difference more than pays for itself.
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