Oil Pressure update
Changed the engine oil & filter today. Valvoline 10w40.
With engine at normal running temperature, Oil Pressure now pegs at 3 whilst driving and goes to 1 at idle.
Same readings after 20 mile freeway journey.
Conclusion; dirty oil and/or clogged filter causing low oil pressure reading.
1991 190E 2.6 170k
1995 E320CA 57k
1999 Chevy Tahoe 98k
2000 R1150GS 45k
1983 300CD 178k - sold, but not forgotten