[johnnydee]

Yes, you are right. Just buy enough to mix half and half and end up with the correct quantity for your trans. Unfortunately, I don't know the correct amount but I am sure that 944 gurus on the forum can tell your right off the top of their heads. On the 901 and 915 boxes it is between 2.5 to 3 liters. I guess you might end up with a little extra if you are trying to hit the 3% ratio spot on. I would be tempted to use 1 liter of the regular and 2 liters of the NS giving you a 2% ratio. If you want to keep your options open, you could buy the above and the small bottle of the friction modifier to add a little if you get noise from the LSD. Doubtful though. 2% should be fine.