the red optima that came with the CRD appears to be 715 CCA. I keep hearing people say it calls for 800 CCA. Where is this listed and why did they put something less in?

Looking at the 750 CCA Yellow top optima since I tow a popup camper.

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"Never mind the maneuvers, go straight at "em," Lord Horatio Nelson

2005 Jeep Liberty CRD

The red top in my CRD is 800 CCA (zero F) and 1000 CA (32 F). I've always thought it was original. . . but can't know for sure. It's still very strong. It's a 34/78 which means it has side terminals also.

When it goes, I'll get another just like it.

Here's their site.
http://www.optimabatteries.com/optima_products/redtop/specs.php

Why yes, a lot of people here favor other brands.

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'05 Sport CRD 107k miles. NOBODY knows everything.

The OE Optima for the CRD only has top posts.