I also think your oil pressure is ok. My E-420 with 242,758 miles holds at 1.5 bar, hot weather idle at 500-550 rpm. Records show regular oil changes with Pennzoil 15W40 through the 200,000 mile mark and I have used Delo 400 since I bought the car. It still has the plastic oilers with no problems yet. I will eventually replace them when I do my upper chain guides. Don

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John 5:25