OK, here's some older samples I dug out.
Same Excursion, first column 12K on vehicle, 7K without drain-done 7/2000. second set 35K on truck, 30K oil-done 4/2001,
third set 65 on truck, 60K oil--3/2002
Iron 28/110/227
Chromium 2/5/5
Lead 6/20/27
Copper 15/69/93
Aluminum 7/10/13
Tin 2/9/8
Nickel 1/2/2
Manganese 0/0/2
Silicon 29/37/27
Boron 36/36/31
Sodium 1/2/4
Magnesium 44/37/28
Calcium 4358/4320/4333
Phosphorus 1257/1271/1236
Zinc 1380/1352/1324
Vis 9.8/10.3/10/2
Soot 1.1/1.2
Oxd 11.1/16.7
Nox 10/15.7/15.7
TBN 12.7/12.5/12.0
Up to 90,000, sampling was done every 15,000 miles. After that, every 10K.
Friend with fleet of Ford turbodiesels said he saw relatively high metal wear for the first 50-70,000 miles. when he retired one at 927,000 for body exhaustion engine and transmission still strong.
Yep, consumption seems somewhat high. At qt per 2000 miles, means that about 40% of the capacity was replaced every 15,000 miles. About like adding 2 quarts to a 5 quart system every 15,000 miles, which wouldn't be unusual.
So, in 100K, use about 50 quarts for makeup.
To get 10 100K, seven oil samples, seven filters, no bypass elements, and about 14 quarts to fill up the new filters
Oil at worst case 65 qts @$6 each= $390
Seven filters @ $14= $98
Seven samples @ $19= $133
Figure in a bit of tax, some freight, some rebates based on volume purchase, we can ballpark this at $650.
If he had the normal 5K drains at the local shop, we are talking close to $100, or about $2000.
At $50, still $1000.
Do it yourself, using decent oil at $1.50 per qt, $14 for a decent filter, no oil samples:
20x14= 280 qts of oil $420
20x filter @$14 $280
Makeup 40 qts 60
Total about $750
Cost effectiveness? Not including time, the enjoyment of being under the truck in cold/rain etc.