Optima Blue Top batteries are marine batteries. Red and yellow top are automotive batteries. Red are starter batteries and the yellow top are Dual Purpose (Starting and Deep Cycle) . Here's a link:
http://www.optimabatteries.com/publish/optima/americas0/en/config/product_info/automotive.htmlYou want a yellow top. Here is what the Optima web site says about the yellow top:
The OPTIMA Yellow Top
Demand more from your vehicle? Then get more from your battery. OPTIMA Yellow Top batteries are made for the extremes. If you have an extreme vehicle, you expect high performance. Whether your vehicle is made to take the abuse of off-road driving or cranking out decibels, you need more from your battery. OPTIMA batteries with patented SPIRALCELL® Technology deliver that performance. The deep cycle characteristic of this technology coupled with its extreme resistance to vibration provides performance vehicles with the repetitive power they need in a spill-proof package.
If your vehicle has a lot of accessories like running lights, high-performance stereo/AV system, winches, or hydraulics, your vehicle demands more from its battery. OPTIMA Yellow TOP batteries provide the extra performance and deep cycling capability that your vehicle demands.
Here is the Yellow Top link:
http://www.optimabatteries.com/publish/optima/americas0/en/config/product_info/automotive/deep_cycle.html