Well Mike, to *me*, iron levels near 90 ppm, with other wear metals near the same relative levels - accompanied by the lab's suggestion that "all is well", just doesn't ring my chimes! 
NOR do I subscribe to the theory that if ya divide the accumulated miles into the contaminent levels, it's all OK and perfectly acceptable... Think about it - if iron ppm at 90 in yer crankcase at *5000 miles* is BAD, why is it any MORE acceptable at 43,000 miles?
Put another way, if someone wanted to sell us what they called NEW oil that had the above analysis numbers, would we really buy it just because a test lab reported it was "satisfactory for continued use" - or would we be looking for some other brand with better test numbers? I certainly know what *I* would do!
We've been thru this drill before, and I fully recognize that extended drain proponents are totally satisfied with similar reports, but I wouldn't be. In my own extended drain "test", if I see contaminent levels rise above levels usually seen at NORMAL drain intervals on stock non-bypassed setups, that oil WILL be drained and fresh stuff installed.
I may be expecting way too much, and get my teeth kicked in as far as my hopes and expectations with the Delo 400 and my Frantz filter are concerned - but NO WAY will oil with iron ppm above 20, and relative similar numbers for the rest, be left in my crankcase! My first 5000 mile oil sample goes out in the morning's mail...
Then we'll see what that and the NEXT 5000 miles reveals!


NOR do I subscribe to the theory that if ya divide the accumulated miles into the contaminent levels, it's all OK and perfectly acceptable... Think about it - if iron ppm at 90 in yer crankcase at *5000 miles* is BAD, why is it any MORE acceptable at 43,000 miles?

Put another way, if someone wanted to sell us what they called NEW oil that had the above analysis numbers, would we really buy it just because a test lab reported it was "satisfactory for continued use" - or would we be looking for some other brand with better test numbers? I certainly know what *I* would do!

We've been thru this drill before, and I fully recognize that extended drain proponents are totally satisfied with similar reports, but I wouldn't be. In my own extended drain "test", if I see contaminent levels rise above levels usually seen at NORMAL drain intervals on stock non-bypassed setups, that oil WILL be drained and fresh stuff installed.
I may be expecting way too much, and get my teeth kicked in as far as my hopes and expectations with the Delo 400 and my Frantz filter are concerned - but NO WAY will oil with iron ppm above 20, and relative similar numbers for the rest, be left in my crankcase! My first 5000 mile oil sample goes out in the morning's mail...
Then we'll see what that and the NEXT 5000 miles reveals!


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