I've got a real good runner I got from Peoria.
After it's good and warm and I slow down from 
high way speeds a buzzer comes on in the dash.
Not all the time.   I have plenty of oil and 
the engine isn't running hot.
I haven't checked the wiring.
I have a good German oil filter.  Mahle I think.
I have both Mann and Mahle here.
The oil may be 5W30.
I haven't changed it yet.
I usually use 10W40.
Thanks.
John.