On my previous 2003 and 2006 Powerstroke trucks, I had the oil analysed and found that it was safe to go 6,000 miles between oil changes and still have lots of useful life to the oil. My dealer usually put a 5,000 mile reminder on the windshield, including my current 2011 truck.

With my current 6.7L Ford the oil life minder has been poping up around 7,500 miles, The couple of oil analysis that I've had done, showed the oil was still good at that mileage, so I've decided to just follow what the command center recommends.  When these engines first came out, I got to read some comments from one of the chief design engineers at Ford. He commented that they had run the test engines and seen routine oil changes in the 12,000+ mile range with no problems and that they set the Oil Life minder at 75% of what they figured the oil life really was.

Most oil bases don't quickly break down. The additives wear out, are used up or burnt off, and become contaminated.

Many people don't realize that to run an oil for an extended length of time, the filter is the weakest link. A standard filter is not usually capable of providing proper filtration, whilst using synthetic oils for extended periods. There are now brands available, that have the internal capacity to properly filter a long lived lubricant.

The filter is as important to the longevity of the motor as is the oil.

The CJ-4 oil standard for diesel engines built after 2007 is designed to carry or suspend the excess soot particles that the egr introduces into the engine.  That oil turns BLACK in color with just a few minutes of use as it quickly picks up the soot in the engine. The suspended soot is supposed to be trapped by the filter as it passes through it.

I was on the road and needed an oil change. The local Ford dealer told me he was booked up for several days, So I stopped by Walmart and bought synthetic oil and had their people do the oil change. It was -25° outside, So I didn't want to be laying on the ground in a motel parking lot changing oil.  They didn't read the capacities and put 15 quarts in my truck ( vs the 13 required.)  They backed the truck out of the bay and gave me the left over oil. Since I bought 4 one gallon jugs of oil, 13 quarts would have left me one jug with 3 quarts left in it.  I had one jug with 1 quart in it.  I told them they had put too much oil in and they pulled the truck back in and drained the oil and put the correct amount in. The truck had been pulled out fo the bay and over to the customer service door and then back into the bay. Maybe 1-2 minutes of run time. Since they made the mistake, I personally witnessed their correcting the problem by standing there to watch the removal and replacement.  The oil that came out after 1 minute was absolute black.  The only thing I could think was that it just washed the color from the residule in the oil pan and off the small amounts that must be trapped here and there in an engine.  Point being color alone is not an indicator of good or bad oil.

I have 148,000 miles on a 2008 dodge 6.7L. I run 5w-50 full synthetic oil in it. I have sampled every oil change since it was new. I am running 11,000 between oil changes with no problems and recommendation to increase. This is probably as far as I will push it. Most new engines and oils there is no need to change before 7,500 miles. You are just wasting money.

I go thru 200 gallons of 15w-40 semi synthetic a year in tractors and semi's and they are all running 250 hrs between changes with oil samples showing to increase intervals but, that is my limit.

When I used to change at 3000 miles, a filter every other time.

Today, at 10,000 miles or "oil life sytem light"  .. full synthetic & filter.  Why keep a qt of used oil and a dirty filter in the system.  Plus I've got all the oil changing stuff out anyway.  Takes me more time to gather everything than actually changing the oil.

Purolator, Fram, Wix, Mobil! and Amsoil are a few of the suppliers, for filters that can be used for extended oil changes.

Most oil changes of less than 10K can use good name brands of a standard duty.

I have a friend who is a mechanic at a Nissan dealership. He tells of seeing leased cars turned in after three years, with the original oil filters still in place. I wince at the damage that has been done to these motors, and how much of their long term life span has been jeopardised. The subsequent owners will pay the costs for this negligence.

My value and ownership of any tool or machine, is often measured in decades, and long term reliability is my major goal. Proper maintenance is less expensive than constant replacements.

sisely ... I looked that their web site.  Not much information on their technology.

Here's a link to an article on oil sensor technology.  Doesn't sound like any current sensors can detect your dirt ingestion problem.

http://www.machinerylubrication.com/Read/562/oil-change-filter-sensors

As a thought, when was the last time you looked at your air filter?  I ask because a mouse had chewed a hole in my truck air filter.  If I had depended on the trucks air filter differential sensor, I'd have been happy as a clam in my ignorance.