residue

I get some oil on the front of the engine around the air intake on the engine and was wondering if anyone had any ideas. I just adjusted the valves and am going to look at the crankcase breather in the valve cover to see if it is clogged. I noticed in some shots on this site that some peole have...

I was given an old gas tank over the weekend. Lots of dirt on the outside and perhaps inside too, so I washed it with soap and water. The outside dried completely, but the inside seems to never dry. When I turn the tank upside down, one drop of water always comes out. I'm wondering, is a gas...