Thank you bigted and ferret, I don't recall ever seeing any red engine oil myself, but as I said, there's nothing to keep the manufacturer from putting dye in it if that seems like a good idea. If so many of the single grade SAE30 oils are red, there may even be a reason for doing it (like they all buy it from the same oil manufacturer, for instance).

unknownVicta, here is the Illustrated Parts List for your engine:
http://bsintek.basco.com/BriggsDocumentDisplay/18mttLXRnfBhU7y.pdf

If you look at the first illustration, Item 15 on the far left is the drain plug. If you go down to Page 10 and look up Item 15, you'll see it is "90946 Plug--Oil Drain (3/8� Standard)". However now that I've been able to look up the specific engine, I see that the oil drain plug is shown as "side" for your model. Here is the specification sheet, which says it is located "Opposite Carburetor Side":
[Linked Image]

I don't have a picture of the muffler-side of the engine, which seems to be what they mean. Please post one, when you've had a chance to look there, low down on the crankcase cover of course, for a plug.