Quote:
Originally Posted by gatorfast
If you look back through this thread you will notice that virtually every M1 0w40 report shows an increase in iron ppm compared to previous TWS reports. To the contrary, these reports typically show a significant decrease in lead/copper ppm. I think enough reports have been posted to establish a trend.
As for what the rise in iron may mean and if it is potentially a problem, I have no idea.
But I am still very curious about the 0w40 report posted a few posts back. Those sharp increase in lead and iron seem way out of the ordinary.
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I agree, iron/lead do seem a tad high compared to others using M1 0W-40, but maybe it was just an initial spike at the beginning of the change... When switching from 10W-60 to 0W-40, maybe there's a small/short running-in period with the lighter oil that causes high initial wear while the thinner oil film is in there, then it settles shortly after to a happy medium. Just a thought, maybe way off.
As for oil consumption, when first switched, it seemed at a higher rate (1qt/1500 miles) then tapered off as the oil aged. For reference, here's how it went down:
Mileage-- Added (qts)--Interval
62170----Fresh--------na
62795----0.5-----------625
63508----0.5-----------713
65744----1-------------2236
67680----1-------------1936
70900----0.6-----------3220
71870----Change------970