So cayman is dry-sump but 911 is not?

From Porsche GB site

Quote:
This proprietary Porsche technology ensures consistent lubrication in even the most extreme high-speed corners. Oil is extracted from each of the cylinder heads by a dedicated scavenge pump. The oil return system features narrow-section lines which de-foam the oil before it is collected in the integral sump. A third pump then feeds the oil back to the lubrication points and the cycle begins once more. A stable oil pressure is maintained throughout the engine, even during racetrack use..

The Cayman S has an electronic oil-level indicator as part of the on-board computer system. The reading is so precise that a conventional dipstick is not required.