Porsche 999.917.080.01

The Porsche 999.917.080.01 specification is an official measurement criterion for transmission oils, developed by Porsche AG to ensure optimal operation of their automatic gearboxes, including 7‑speed PDK, Tiptronic and other multi‑speed systems. The technical requirements cover viscosity stability over a wide temperature range (from –40 °C to +120 °C), high resistance to oxidation, controlled friction characteristics for smooth shifting and protection against wear of synchronizers and friction discs. The specification provides compatibility with Porsche metal and polymer seals, as well as with electronic transmission control systems that require precise torque control. Although it is primarily targeted at Porsche gasoline and diesel engines, it is also applicable to similar high‑performance automatic gearboxes from other manufacturers that adhere to comparable thermal‑stability and friction requirements. XENUM products bearing the Porsche 999.917.080.01 designation guarantee compliance with these requirements, delivering transmission durability and stable operation under any service conditions.