reach down the back of the engine between the firewall and intake manifold, its the yellow wingnut about half way down the block. youll have to unscrew it to get it out
S/C dipstick - Get a good torch! It will make this much easier!
- look down the back of the engine near the throttle body. It should be a little yellow handle that looks a bit like a wingnut (I have seen one that wasn't painted yellow though).
Unscrew the wingnut and pull the dipstick out. From the full mark to the low mark is 100ml. Push the tube well into the hole when you are filling it up - otherwise the oil can bubble out as you squeeze the syringe.
For more info do a search on this forum for s/c oil or snake oil (I'm not kidding)
If you have any probs give me a call.