The answer is it varies:
- If you have the FDII or an FDI with the engine oil cooler you will use more oil
- The oil should always be checked WARM, 5 minutes after the engine has been used for a while is best
- Many have moved to 5w-30 vs 5w-20 there are no warranty issues doing this and may obtain better engine protection
- I have generally found 4.7 L is required (best to start with 4 L and add from there after checking the dipstick
See:
http://www.jeeppatriot.com/forum/showthread.php?t=7231
Below are the official capacities for all fluids. Admittedly it is a bit missleading, however directly from the Service Manual:
Fuel Tank
51L (13.5 gal.)
Engine Oil - 2.0L Diesel
With out BSM 4.0L (4.2 qts.)
With BSM 4.3L (4.5 qts.)
Engine Oil - 1.8L,2.0L, 2.4L
4.3L (4.5 qts.)
Cooling System - 1.8L, 2.0L, and 2.4L
6.8L (7.2 qts.)
Cooling System - 2.0L Diesel
8.5L (8.0 qts.)
A/C Refrigerant System
0.51 kg (1.125 lbs.)
Automatic Transaxle - Estimated Service Fill
3.8L (4.0 qts.)
Automatic Transaxle - Overhaul Fill Capacity with Torque Converter Empty
8.1L (8.6 qts.)
Power Transfer Unit - (PTU)
540ml (1.1 pts)
Rear Drive Assembly - (RDA)
500ml (1 - 1.1pts)
Manual Transaxle - NV T355
2.4 - 2.7L (2.5 - 2.8 qts.)
Manual Transaxle - BG6
2.0L (2.1 qts.)