oilsump tank half full ?

[TAM747]

need some advice, please.

usually, when the sp6 is cold, oil runs down and the oilsump tank is near to empty.

since some weeks my tank is half filled, same after driving or just undriven and cold.

what could i do ?

[TAM747]

.. i have done this, shows the same.

so, hot engine stopped, immediatly wiped the oilstick and - half full ..

[TAM747]

thank you !

oil is at 95° and still same.
next week i will do a oil-change and see what's going on.

[TAM747]

cold oil shows oil above the max. on the stick. this is why i'm surprised as last year it showed a little bit at the end of the stick when cold.

[TAM747]

.. i will fit also a new pressure relief valve spring ;-)

oi pressure is around 60psi at 95° and 3.5k rpm. (5w-50)