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Mine started to run a tad bit hotter after Bmw switched from Castrol to the shell 10w60 . Also noticed that the oil warms up quicker ... I am guessing the shell 10w60 is marginally thinner than the Castrol OR at least has slightly different operating characteristics ... dunno if anyone else has noticed this .... plus ... n this maybe completely subjective, but , the engine feels somewhat smoother when at full
Operating temp with the shell than it did with the Castrol . Mines a 2012, 64K miles bought new. Oil changes every 7-8K after the 1200 and 15000 mile service.
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