Pathfinder I
For mine I settled on Rotella ELC coolant, it was the most compatible choice stocked locally.So, did you find a suitable anti freeze for your Disco ? I was going to install a new 180 degree f thermostat. I dont know how many years old my anti freeze is because there is no drain plug in the LRD2 system. How old is old and is there a special antifreeze for LRD since they have an Aluminum block and heads. I know aluminum breaks down from improper chemical use. Until I know more about anti freeze I won't go forward with the thermostat change. I'm not having any issues like over heating but everything tells me I should be draining all my fluids after 20 years of service and replace them.