Is it possible that the braking is just perceived as poor? I know after driving around in something differnet for a couple of months, especially something that might have had better brakes, that i might perceive the brakes on my car to be worse that I previously thought?
That said, 13 years without a fluid change is a very long time. Over time brake fluid is affected by water, reducing its effectiveness. If your selling, all Dot 4's are equal, don't buy Honda stuff that's overpriced, Castrol is fine.
