When I bought my Saab a couple months ago, it had a very slow oil leak coming from the camshaft (where the distributor would be mounted if it had one) I finally got around to sealing it with RTV silicone a week or two ago, but it had obviously been left unattended for a while before I got it. Quite a lot of oil seems to have been baked on to the side of the engine and transmission, as well as the engine compartment. It's not pretty to look at, and I'm worried about it clogging up the works (even if it might inhibit corrosion somewhat.) However, I have no idea what to do. I was wondering if there's perhaps some sort of solvent I could wipe it down with, which wouldn't damage any rubber hoses or metal?