oil pressure light
 

So my 2005 s4 consumes about a court of oil every 6 to 8 weeks 5 to 800 miles.. anyways i usually just top it off and all is well. I topped it off 3 days ago and slightly overfilled. Today my oil pressure light came on. Engine sounds fine car drives as it should but this light is very worrisome to me.. any ideas on common issues with these models that cause this?

oil light
 

hi im new to the sight,
I just purchased a audi s5 2008, with the following issues and would appreciate any guidance and advice?

1, oil light is on, previous owner said he topped it up and will not disapear
2, common issues to look at
3, rear fog light bulb type
4, number plate bulb type
5, does the engine need a warm up time

thanks
Dan