Here's my latest sample taken on Feb, 10th 2016. 18000 km's on oil with a Puradyn TF-24 bypass filter on it. 16 oz of Archoil was added at 3000 kms which raised both Potassium and Boron. System is posted in the Bypass filter section if anyone's interested. From now on I'll be taking annual oil samples every 18000 km's.
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