Oil leak at hight revs

[Jhenry04]

Hi guys,
I have noticed an oil leak of about 500ml of oil per week of daily driving, but only from revving over about 5k, the past couple of weeks I have lost no oil and only driven under 5k. Does anybody know what could be leaking? The oil can be seen in my attached photo.
Thanks.

 

[R20BTG]

Have you overfilled?

 

[Jhenry04]

Have you overfilled?

No mate never. I’m normally sat at about 3 quarters on the dip stick.

 

[LiamP]

Potentially main seal, I would give it a good clean up with some brake cleaner and try and see where it comes from.

 

[Jhenry04]

Potentially main seal, I would give it a good clean up with some brake cleaner and try and see where it comes from.

Will do thanks

 

[Kalamat88]

Overfilling would cause that? I thought all of this is enclosed and hemmed in. Does it basically slosh to the point it hits where the gasket is and leaks that way? I don’t understand. I thought it would just mess with the harmonics of the crankshaft.

 

[LiamP]

Oil is pumped to the bearings, jets and head, the former gets sprayed everywhere and settles into the sump and the latter drains down basically on the inside of the block. The rear main has an oil feed from main cap 1 so it sees a lot of oil and tends to leak if old or not seated correctly.