what kind of motor oil is best to put in the 1991 525i bmw?
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1991 BMW 525i Question: what is the best motor oil to use
Answer #1patrick mannion from Greg Solow's Engine Room, July 14, 2010, 01:31Master
When it comes to engine oil everyone has a preference or anecdotal evidence why one oil is better than another. Engines that have higher mileage or have started to "burn oil" ,I would have no problems recommending a higher viscosity oil perhaps 20/5/0 thicker oil should give adequate protection and "burn" less oil. The key to long engine life is frequent oil changes!