Picked up my new Ranger last weekend, noticed on Thursday coolant was low about 2 cups, so while I was in Napa picking a serpentine belt for my ION and only having DEXCOOL around home I picked up a jug of their conventional green coolant(Ford Spec ESE-M97B-44-A), topped off the reservoir and thought nothing else of it. The local Ford parts guy is telling me it came with Ford's Premium Gold coolant in it. The coolant in the overflow tank was a bright green/chartreuse colour. NAPA had G-05 coolant but it was orange in colour figured it wasn't the same stuff so I didn't buy it, and with a new truck didn't want to use a Universal Coolant. Do I need to drain the system flush it and put in Ford's Premium Gold Coolant or leave it be?