Generator leaking oil

Hi all, I've got an Onan 2800 generator on my Pleasure Way Class B RV. Recently it just started leaking oil. It only has about 30 hours on it. I have not really checked it out to see where it is leaking but it looks like there is some oil on the side of the generator under the air filter and then multiple drips under the oil pan. I was just wondering if the 2800 gen has a typical place that it might be leaking from based on someone's experience with perhaps the same problem. Thanks.....Don. I will check it out more thoroughly soon.