Re: EB leaking oil
Places to look:
1. All over the outside (of the donk...) You're looking for gasket leakage -- rocker cover, timing cover, front main, rear main, etc. You may want to have the engine bay cleaned first, & I recommend having the professionals do it -- they get to clean up the mess!!!
2. With COLD engine, lift the radiator cap. There should NOT be oil floating on the water.
3. With HOT engine, pull the dipstick. You should NOT see a gooey muck.
4. Tailpipe. It should NOT have a slimy black coating. Check for foul blue smoke at any stage of acceleration -- you may want to bypass the Cat. Converter which will try very hard to remove all evidence of oil-burning.
The valve stems could be leaking. There's only one cure -- off with its head (!) and do it properly. Just replacing the collets is not a good way to go, 'cos you don't know what shape the stems are in.