Strokin69
New member
Hey i need some suggestions I'm about to bulletproof my 6.4 bc my oil cooler is bad,I'm going to do a coolant flush while I'm at it, I'm ruining the zerex g-05 gold in my truck now but I heard international recommends the rotella red cat elc, do I need to stay with gold or go with the red, bc I heard the wrong coolant can mess up the coolants system