Not Ranked
My 12+ year old Optima Battery was not holding a charge well, so I replaced it with another one from Summit Racing - Yellow Top (Aug 2013). Wow! What a difference! Not only did it spin the starter motor faster, but it gave more "juice" to the ignition - this new battery really helped my engine start, warm or cold. There may be some who don't like Optima's any more, this one is working great for me.
Just a week ago I implemented the fix to the Voltage Regulator, as Steve-O describes above. Maybe not have that fix caused my 12+ year old Optima to die...
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