You can read up on the p-car DIY and in the Adrian Streather book and assemble the parts you need to do the job. Typical fixed menu priced oil and filters service on your Porsche 993 cost between £200 and £500 depending where you take it for the work. The usual independents in the north of England include Hartech, Sports and Classic, Pro-Porsche, Ninemeister, and Unit 11.
I decided to so the service myself after reading through the p-car article and having a good look under the car to familiarise myself with the job.
First of all it was clear that the drain plugs on the sump and thermostat housing had seen better days so I ordered new ones from Porsche and they were reasonably priced.
Engine case sump nut 944-107-197-01 £9.55
Thermostat housing sump nut 993-207-258-02 £12.56
add in the service parts too:
Oil filter small 993 107 203 03 £12.84
Oil filter large 993 207 201 02 £9.87
O-ring for thermostat sump nut 999 701 269 40 £4.01
22 x 27 seal for sump nuts 900 123 118 30 £1
Oil Motul 8100 X-cess 5W-40 Synthetic-1 oil x 10 Litres £60
So service items alone come to around £110 - I used only genuine Porsche parts and approved oil.
You can see the chewed up thermostat plug here.
and the new one as a comparison. It's aluminium so open to abuse - best to use a 6 sided socket on it. When you remove the plug to drain the oil it's best to warm the engine up until about 9 o'clock on the temperature guage or until the oil cooler pipes get hot. This way the thermostat is open and you'll drain the oil in the cooler too. Beware though as nearly 10 litres of hot oil come out and fast - you need a big oil catch tub!
With the rear arch liner removed you can easily get to the thermostat filter (the larger filter) and with the car jacked up a little you can remove the filter with a 74mm x 14 flute wrench. I bought my wrench from GSF Car Parts for about £9.
Then time to undo the engine sump nut and filter. The nut is straight forward and I drained about 0.5 - 1L or oil here. The filter requires you to remove the oil return line from the block. You can see it here circled in red.
Then you can easily get the filter wrench on the filter and remove it.
Here's a view of the filter mount.
New filters to go on. Genuine Porsche and remember hand tight only! I mark them up with a date or mileage or both for future reference.
Then filled with around 8 litres of the new oil and start the car, check for leaks and top up until you get the appropriate reading on the dip stick - the oil level gauge in the dash board isn't accurate until the engine is up to temperature and the oil thermostat is open. I was surprised to find that I used all 10L of oil suggesting that I drained virtually all the old oil in the system.
