What does everyone think of 5w-50 synthetic or heavier oil (15w50) in a 95 bmw 525i with thr 6-cylinder m50 tu engine with vanos? I was thing specifically about Pennzoil platium 5w-50. currently using Mobil 1 Truck and suv. I think it is 10w40 and uses no oil between 4,500 mile oil/filter changes.
These cars were originally speced for heavy weight conventional oils? I have tried 0w40 Mobil 1 and engine was just louder sounding and had high anounts of lead in oil analysis. Lead lowered with heavier oils. Just looking for opinions.
These cars were originally speced for heavy weight conventional oils? I have tried 0w40 Mobil 1 and engine was just louder sounding and had high anounts of lead in oil analysis. Lead lowered with heavier oils. Just looking for opinions.
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