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    Validity of the "4-ball" wear test in engine lubes

    I keep running across Amsoil related threads, and every so often the old "4-ball test results" Amsoil uses in their advertising resurfaces. I've been curious as to the validity of that test method, in regards to *engine* oils, and did an Internet search - found out others, including Mobil co...
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    analysis, particle count - Delo 400, Frantz bypass

    This was done by Blackstone - 5000 miles on oil, Fleetguard 3894 full flow filter, Frantz bypass: Here's the particle count: Now, according to particle sizes common to NEW, unused oil right outta the can, that particle count ain't BAD! I did this for my own info - and also because we...
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    Oil analysis with particle count?

    Sure seems odd that with all the discussion in this forum on the various pros and cons of different bypass filters, there precious LITTLE info posted here clearly displaying particle counts. Sure, regular analysis give some helpful documentation as to bypass filtration effectiveness - but it...
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