Driving home my new 560SL, first time out after sale, I stopped at a service area off the interstate and checked the oil, which looked about 1/3 down. I added a quart, and re-checked to confirm now at the high mark.

After driving an other 4 hours at 70 - 80 mph, I was stopped at a light and blue smoke was billowing out from under the engine bay area. I figured something had leaked onto the exhaust, and carried on to destination, about another hour. I opened the hood and a LOT of oil had sprayed over the right valve cover and upper engine area/right firewall area.

I checked the oil filler plug and it looks like it's missing the rubber gasket, so probably the oil had been pumped out there (where else could fresh oil come from on that side??).

How could the oil pressure get that high, or too high, to cause this? I might have over-filled some, maybe didn't wait long enough for drain down from the right cylinder head fill hole to get a proper reading. But why the higher pressure? Blowby from the cylinder(s) on compression/firing stroke? Wouldn't this cause burning oil or low compression too? How to check - a compression test.

Could a small extra volume of oil cause this by increasing the pump pressure, or maybe too much oil to send down the drain hole in the head, so it goes out the easiest way?

__________________
1986 560SL
2002 Toyota Camry
1993 Lexus