Oil leaks

When I go very fast (100 Km/hr) oil squirts out the front onto my right boot. When I dive normally, oil leaks out slowly everywhere.

I thought it might be the head gasket.
The Dynamo vent hole/dynamo gasket ring is a very good possibility for the leak at hight speeds.

From Lars Persson, "Believe it or not, but the oil does not come from the head gasket. There is no oil channels in conjunction with it. Usually the oil comes from the dynamo vent hole, dynamo gasket ring or the cam shaft housing and is blown down into the head area. To ensure that the head gasket is tight, take a compression test. When a head gasket leaks, it is usually between 3:rd and 4:th cylinder. Observe that dry cylinder walls can cause a false reading and so could leaky valves.  If a gasket start to leak, it will VERY soon develop a channel from the cylinder to the outside or to the next cylinder with drastically low performance and very uneven running."