TITAN SINTOPOID 75W-90 synthetic axle fluid offers good driveline efficiency suitable for high-offset hypoid drive. Good cold start behavior. Suitable as fill for life fluid according to manufacturer.
Titan Sintopoid Transmission Fluid (Transaxle) SAE 75W-90 (1 Liter) NOTE: 1.5 liter capacity for front differential/ 0.9 liter capacity for rear differential.(Rear Diff.), Boxster/Boxster S (2005-08), Each Brand: Fuchs [More Info]
Red Line Transmission Fluid
The Red Line 75W90 No Slip gear oil is designed to slow synchros for easier shifting across a broad temperature range. It contains extreme pressure additives, but lacks friction modifiers to balance slipperiness. It includes copper corrosion protection to prolong synchro life.
Red Line 75W/90 Non-Slip GL-5 Gear Oil, 1 Gallon [More Info]
Swepco Transmission Fluid
This stuff is the industry standard for keeping your manual transmission alive and kicking. Some owners will swear that their transmission shifts better with it loaded with Swepco 201. No additives are needed - they're all in there, including a new super-duper, space-age, low-fat, high fiber additive called LUBIUM that forms a protective film on the internal components. And, if that isn't enough, it's this really cool blue color too!