Zerex G05 Phosphate Free Antifreeze Coolant Concentrate 1 Gallon

for just three or four dollars more you get the concentrated instead of using the 50/50 you can get two gallons of antifreeze out of this it ain't going to be perfect exact use distilled water and cut it in half and you got two gallons for three or four dollars more than what you can get the 50/50 I always use concentrated that's all the factory does is cut it with half water distilled