Oil in my airbox, please help
Was cleaning up the engine bay of my Ranger, thought I would inspect the air filter while I was at it. When I opened up the airbox, there were small pools of oil in the crevices that make up the bottom of the inside. Looks like engine oil, slightly used. The air intake silencer seems to be wet from oil too, and theres lots of dust trapped. Thankfully though, it seems that none of it has managed to seep through the filter itself, and sneak into the engine.
Does anybody have any ideas as to how this could have happened? Or where the oil has come from? I had a good look everywhere under the hood, even crawled underneath to take a look, and I am completely stumped.