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I have one on my S54. Not a good idea for street driving below 50 degrees with 10w-60. The oil will never warm up.
It gives you a couple of minutes more of time below the red. Otherwise it didn't make a significant difference. I think a fresh OEM oil cooler and diverter valve will make a big difference.
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2018 F30 320iX Melbourne Red
2011 E90 M3 Monte Carlo Blue
2004 E46 M3 Imola Red
2000 E36/7 Z3 Steel Blue
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