Rotella T 15W40 18000Km's on 93 Cummins 6BT.

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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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Those numbers look great to me. Is this the first time you have ever used Archoil? Was it Archoil AR9100? Do you use the AR6200 fuel additive?
 
Originally Posted By: GaleHawkins
Those numbers look great to me. Is this the first time you have ever used Archoil? Was it Archoil AR9100? Do you use the AR6200 fuel additive?


Yes first time I've used it, I added 16 oz of Archoil 9100 at 3000 Km's on this engine and also run the 6100 in the fuel. My plan is to run annual oil samples every 18000 Km's and only change full flow filter and the bypass at 36000 km's. So far so good for the old Cummins:) The Full flow filter is the Amsoil EO080 and Bypass Puradyn TF-24.
 
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