According to its wikipedia article, the Dragon 2 is powered by 8 SuperDraco engines. And according to the SuperDraco's article, each one of them can store up to 1,388kg of propellant at an Isp of 240s. Does that mean each engine has that amount of propellant? Even if I generously give the Dragon 2 a dry mass of 10t (e.g. including crew plus cargo), that would amount up to 1,7km/s delta-v. That seems to be quite a lot for a LEO-ferry. On the other hand, it is not enough for a moon landing. So what motivates this budget?