Yeah, that's what I did. I once (don't ask) left the oil cap off and drove around. When I stopped I had loads of smoke spewing out from under the bonnet. I thought something REALLY BAD happened. And then, I popped the hood open and found I just left the cap off and oil had sprayed all over under there. I took my VX to the local DIY car wash spot and used a small amount of Engine Brite and got it cleaned up.
I know there is some Earth friendly engine cleaner out there somewhere.
Bart