Matt Bachand
Depends on the 6.5
Like I said in an earlier post, and Doc confirmed, the Duralasts are 800 cca, not 1000. If you know of a part number for a 1000 cca version I'd love to have it!
Matt, I hadn't heard that before about less life with more cca. I want the power for cold starts so I'm not going to worry about it too much.
Its something to do with the size of the case. Unless you go 'big rig' large type.
They have to put more plates to get the higher rating, and there is just more there to go wrong. I don't know all the details.
That is why you are always recommended to get what the vehicle needs. And why there is a limit of usually 1000ca or cca.
Don't get me wrong. More the merrier especially when it comes to cranking power, but for every upside, there is a downside. Don't let my input be a deciding factor in your battery choice by any means. I don't know the details, nor can I explain my reasoning well. Perhaps its something to do with the cell walls being thinner, or something. I don't remember exactly, but with more plates there is more chance of failure in between them.