Too much fork oil

[Bald-dude]

Will adding too much fork oil cause the front suspension to bee too stiff?

[DFragn]

Why are you considering this? If it's about a soft condition replace the springs. Trying to do it with fluid could blow a seal.

YES, adding beyond OE spec's will reduce the air space in the tubes.
Remember that... air compresses - fluid does not.

[Bald-dude]

I had my seals replaced at the dealer and it just feels stiff.  Might just be me.

[DFragn]

I had my seals replaced at the dealer and it just feels stiff.  Might just be me.

It's possible the dealer screwed up [too much] but unlikely. Give it some time and see how it feels out for you.

A couple of extra ounces [beyond spec] would make a difference [harder].

Were the seals leaking? If so, loosing just an ounce would make it softer. That could be the different feel you sense and became accustomed to.

[John Schmidt]

The dealer might also have used a heavier oil, but generally a slight excess will do as DF said. And true...yours may have been low and you got used to it being a bit soft.

[asfltdncr]

And....Lead to seal failure.  Make sure you don't have too much oil.