Your truck is out of warranty so no issues with biodiesel and a voided warranty. We only buy diesel at stations with high fuel turnover. Sometimes that means not paying the cheapest price. And we try to avoid biodiesel if at all possible though in some states like Illinois, it is just about impossible and the pumps only give you a range of percentages. We traded in our still under warranty 2012 Ram dually for a 2015 Ram dually because we are full timers and had trouble finding non biodiesel fuel in many places.