Yeah dont use dexcool. Just use whatever coolant was in there before, if it was red use red if it was green, use green. If you're gonna be switching coolants then make sure you flush all the old stuff out. Keep flushing it out until the water runs clear. Ive been using prestone green in mine and it works just fine. Once a year i'll drain and flush the radiator and the block, and then fill'er back up with a 50/50 mix.