It doesn't appear to be bulging (would be noticeable from the top cap), but it does appear to be leaking. It is time to replace them even if they test okay.
Is my capacitor bad?
My capacitor has a bit of oxidation indicating some leakage, but no liquid come ng down the sides or on the board. See photo. Will changing this improve the sound?
Also, if the specs are the same, does it matter which brand I use? I'm replacing Elna which I'm assuming (guessing) w