I *think* that oil is blowing out of the dipstick hole - that would suggest a blocked engine venting system...

My car does not have any breather tube on the valve cover - but it does have a vented oil cap: Vented Oil Cap from Moss Website

It seems to me that the vented cap should be sufficient to vent the block and prevent oil blowing out the dipstick hole - no?

I'll take a look at the cap tonight - perhaps the vent has somehow been blocked?

1965 Plus 4
2008 997 Turbo Cab
1981 Alfa Spider
1954 Austin Healey 100 (SOLD)
2013 M3W (SOLD)