The 718 Cayman T is not the easiest car to do an oil change on. I did one modification to make doing an oil change quicker at least. The first trick is getting the car up in the air in order to be able to reach the drain plug and oil filter; the jacking points are the same locations as the jack stand points, so there is some creativity and proper equipment selection required to get the car up in the air. After that, you have to remove the massive undertray by undoing many fasteners in order to uncover the drain plug. For whatever reason, Porsche could not build in a small access panel for the drain plug like so many other cars.
I made a permanent opening using a 3” hole saw in order to make all future oil changes a step easier. I also figured, there are already a bunch of other vent openings in the undertray, so why not add another?
I went with Motul 8100 X-clean gen2 for the first oil change with OEM cartridge filter. The newest Porsches specify an oil with their C40 specification which I believe is to be compatible with the latest gas engines using particulate filters.
I think I did a pretty good job lining up the hole location. I used a tape measure and picked two of the undertray fastener locations as my reference points. I missed a spot in cleaning up the oil around the plug. Fun fact: the 4-cylinder turbo engines get an aluminum oil pan whereas the 6-cylinder 3.0L turbo engines in the 911 get a plastic oil pan. The 4-cylinder engine places the headers, turbo, cat, and downpipe all around the oil pan, so the pan had to be aluminum in this application to prevent being damaged from the heat around it.
There is no traditional oil dipstick, so the standard way to check the oil level on a modern Porsche with a flat engine layout is to use the digital dipstick. The resolution of the digital dipstick in the dash is not clear, but I think it is in quarters. The owner’s manual calls out for 5.7L of oil when also doing a filter change. I did not know how well the oil would drain with the way I had the car lifted, so I initially filled with 5.5L which resulted in the dipstick reading about half full. I put in the remaining 0.2L and it read about three quarters full.
Someone on the forums figured out how to read the engine oil level sensor directly using the Launch X431. This 91mm reading is after the car had been sitting for an hour or so and the oil cooled off some, but still warm. Taking a measurement full cold, I got 80mm. The owner’s manual says to get the oil fully warm, shut off the engine, and wait one minute to check the oil level using the dash gauge. I did that while checking the oil level sensor readout and the oil level was down at 80mm and increasing as more oil drained out of the nooks and crannies of the engine. One minute is not enough time. Taking a reading about ten minutes after shutdown from being fully up to temperature, I measured 97mm.