That would be moisture in the oil.
Condensation of moisture mixed with the oil film inside the cap. If oil in oil pan is not "milky" you are ok.
Oil filler cap cover the hole in the engine where engine oil is added
An oil filler cap is a metal that covers the hole where the oil is poured.
Check the oil filler cap or the owners manual for recommended viscosity.Check the oil filler cap or the owners manual for recommended viscosity.
Open filler cap, add oil, replace filler cap...
There is usually a cap on one of the valve covers. There is an oil filler cap, you are just overlooking it. Look closer.
It is in the back side of the oil filler housing. Look just behind the oil filler cap.It is in the back side of the oil filler housing. Look just behind the oil filler cap.
try taking off the oil filler cap at the top of the engine...on my '95 turbo 900s that's where it was, the oil stick was attached to the oil filler cap.
connected to the oil filler cap
If there is a lot of it, it is a clear sign of a blown head gasket. If it's just around the lip of the filler cap, it is only condensation and nothing to really worry about.
Remove the oil filler cap and there should be a dipstick attached to the cap
In the engine, usually through an oil filler cap.