Add Yahoo as a preferred source to see more of our stories on Google. McDonald's has become an iconic American fast food restaurant for a number of reasons, including its Big Macs and French fries.

Now that we know why McDonald’s ice cream machines are always broken, I think it’s high time we solve another Mickey D's mystery: Why McDonald’s Coke tastes so much better than other fast food chains.

Whether you call it soda or pop, it's easy enough to get your hands on an ice-cold fountain drink; You'll find them at any restaurant or gas station. However, there's just something different about ...