About every third oil change, I go 7500 miles between changes (Mobile 1 synthetic), I send samples of engine oil, transmission fluid, and differential lubricant to a company called Oil Analyzers, Inc.. Google it and you will find all the information you need concerning engine, transmission, and differential lubricant contamination. About every sixth oil change I also have my engine coolant analyzed as well. Ffter your initial sampling, each subsequent analysus will tell you, in detail, just how the moving parts that require lubrication, are wearing.
The kits are "item specific", and run about $35 bucks for each kit.
Engine Oil, Transmission Fluid, Differential Lubricant, and for those of you that are driving 4x4's, Transfer Cases, analysis kits" will cost about $120-$150 per analysis (depending on the number of fluids you wish to have analyzed and how many "kits" you need). They keep a data base on each of your components and each analysis 'kit' is engine make and displacement specific. They also give you information on what parts are wearing abnormally, thereby allowing you to replace worn parts whose failure might effect other parts.
Please understand, I am NOT dissing debris removal magnets or plugs. They do a very good job of keeping metal debris out of lubricants. They have been used in the aircraft industry since forever and I use them myself.
They are, without doubt, excellent ways of keeping debris out of liquid lubricants. However, one must remember they apply only to ferrous metal contamination. And many of the parts in rotating or reciprocating components are made of materials that magnetic particle removal does not apply to.
IMHO...lubricant analysis is cheap insurance if it prevents a catastrophic failure caused by wear that occurs in every engine, transmission, differential, and transfer case, and any other assemblies that require liquid lubrication.
"...Oh Lord is this gonna work...or are we just pissin' in the wind..."
2002 Edge, 3.0L, 2WD, LED Tail Lights by CD, Smoke Halo Projector Head Lights by Spyder, OEM Code 1 Torsion Bars, Kenwood KDC-BT555U, Kenwood Speakers...more to come.