After a few weeks with squishy hydraulics, I finally bit the bullet and bled the brake system. As it turns out, the old fluid had deteriorated, being quite discolored, so i ended up doing a replace and bleed instead. This Dot 5.1 fluid seems a little paler than the SRAM branded bottle I had previously used, but I could be mistake. At any rate, it's a little less expensive. A word to the wise - if you are tempted to buy a larger container at the auto parts store, realize that once open, the stuff is not usable beyond a year, as it absorbs water from the air. So unless you either bleed your brakes very frequently, or have a fleet of bikes that use Dot 5.1, it makes more sense to stick with this small bottle. I replaced the fluid front and rear on my SRAM brakes, and there appears to be enough left for one wheel's bleed should i need it.