I used that on my auto x5. It has slowed it down quite a bit and it has only been about 250 miles. I will change the oil next year sometime to give it more time. I only put about 1k a year on the auto x5 so it will take to some to really see how it works.

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2001 E53 X5 3.0 Auto. Silver Black Build date 10-17-2000 141kmiles

2004 E60 545i Sport 6MT. Black/Black Build Date 6-2004 102k miles