fracl Posted July 3, 2015 Author Report Share Posted July 3, 2015 just warrenty issues with wiring different batterys together, speak to your optima dealer and see what they say, if they say it's fine to run the two together, go for it. thanks for the advice. Link to comment Share on other sites More sharing options...
everybodyknowme Posted July 3, 2015 Report Share Posted July 3, 2015 Yes you can run red up front and yellow in the back. Did it for years with no problem, but like he said if you want to double check ask the optima dealer. Link to comment Share on other sites More sharing options...
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