After going through my second set of batteries since I bought the truck, I am thinking of going to Optima batteries but not sure what color top to get for the diesel. Has anyone with a diesel used these and if so, which ones did you use. Right now, I don't drive the truck as much as I used to but that will probably change when winter arrives. I will also probably look into setting them up like what Hoff did with his (i think) but definitely will be putting a batter tender on to help keep a charge. Any input will be appreciated.