Notchy shifting - which transmission fluid to use?

In the morning my boxster shifts a little notch y.
After about 15 miles it shifts very smooth.
I am using Redline 70/90w
Should I change the gear oil to something else.
It has about 10k on it.

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This post was auto-generated based upon a question asked on our tech article page here: Pelican Technical Article: Boxster Oil Change

[Wayne 962]

I would try the Mobil-1 synthetic that I believe Porsche recommends. Everyone seems to have a different experience with transmission fluids, it's difficult to determine what is good for one person or another. Still, the synthetics seems to work well.

- Wayne

[caymanStef]

I use Pennzoil 75w90 gl5 ,smooth shifting it my track & week- end car

[dghii]

How old is your car? When did you last change your front motor mount? Shifting is much improved if you replace a worn mount.