We have a Hyundai Tuscon and based on the Owners manual, I should be able to use Prestone antifreeze. OM says ethanol glycol based antifreeze and there is no other specific requirements ... However the antifreeze in the car is kind of blue (if I recall correctly) and few people (including the parts dept at Hyundai) have told me not to use Prestone ... another guy at auto parts place told me i need to buy a special antifreeze for Japanese cars like zerex Asian??? I have to trust the OM (unless if it is out of date) and besides I have 3 gallons of prestone in the garage... lol something doesn't make sense here! I haven't done a lot of research but I should be able to trust the OM. No?