Oil Leak

[mattylondon]

Over the weekend I noticed tiny patch of oil on the undertray. There are traces of oil on the alternator. Visual inspection was difficult but the source will be something around the oil filter which is above the alternator. Hopefully it's not the oil filter housing or oil cooler...

I took one photo by removing the drivers side fog light grill where you can see the alternator.

As the air filter box and ducting is roughly above the oil filter housing, will I get a better look if I remove these?

Also, is this a known leaky area on the V8's?