It will save on tire wear that's for sure. The closer to 0 the better. Toe out can be hard to handle and even 0 toe in the rear can be pretty twitchy. I think mine is just slightly in at something like 0.02 but that's just cause the bolts are old, rusty, crusty, and very coarse threads according to the alignment guy. But yes, toe is pretty much the only thing adjustable with the stock parts.