I decided to change the gear oil on my 2001 Box S that has almost 140,000km on the odometer. I bought the vehicle used from Rizza Porsche in Chicago back in June 2009. It had just under 70,000km when I purchased it.
Anyways, never completely happy with the shifting in the Boxster S. I tried the Pedro Enthusiast mount shortly after I purchased the vehicle, and it's still in there all these years later. There would be odd random times, where the car would not go into 3rd from 2nd under moderate to hard acceleration, of course, it wasn't something I could duplicate, just annoying.
As far as I know, it's just the factory fill that is in my Boxster. I researched the different options, and availabilities to me locally, and my indy could get Fuchs Titan Sintopoid, Motul Gear 300, and the Liqui Moly, all in 75w90.
The change over went fairly smoothly, the drain and fill plugs were very tight, requiring a breaker bar to remove. Remember Lefty Loosy, righty tighty, especially working overhead. Lots of pics online on the fill and drain plug locations. I snugged them up to factory spec about 25-30 Nm, and re installed the bracing.
I have a maxjax lift at home, so it was a fairly easy project. I could not find a fluid transfer pump that I trusted at home, so I routed a 5' piece of clear 1/2" tubing from the fill location above part of the exhaust and up above the driver rear wheel. I taped it loosely in place so that the end of the house would not fall out of the fill hole and squeezed the warmed fluid into tubing. Gravity took over the rest. Took under 2 minutes per L to fill.
---
It's warm now (high 60's low 70's last evening), but the car shifts like a Honda Accord, which to me is a good thing. I'm going to put it through it's paces on Friday as I am attending a track day put on by a Porsche dealership about 1hr away. I think the shifting action is better than with the up to 17 yr old fluid that was in the car before.
My boxster was never the best shifting vehicle in my limited stable... During the past 9 yrs of ownership, we've also had a 2002 Jetta 1.8T 5 spd (sold), 2003 Honda CR-v (5 speed), 2006 Jetta TDI (5 spd), and Honda VFR800 (6 spd motorcycle). With the fluid change, it seems it has moved from last to 1st.... will keep an eye on it.