OIL leak

Hello I was changing the oil this afternoon and noticed oil leaking at the exhaust manifold, Any idea what is the cause, if I should worry about it or just keep adding oil. I used to use a quart and a half every 3000 miles when I ran mobil 1 but have since changed to Valvoline high mileage synthetic blend and maybe have to add half a quart every 3000. Car runs great it has 120000 miles without a problem

i would diffenitely worry about it.if its leaking onto the manifold it will ignight eventulitly!!!anywhere else & i would'nt care besides the mess & $$$.clean it up & see if you can see where its coming from.

I never occured to me that it might ignite, I will put it up again today and try to find the source.

thanks