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Discussion Starter #1
What kind of oil change intervals are you guys getting? Might dash is telling me I need to change the oil soon and it's been 2400 miles. I do easy city driving and the only "extended idling" has been about 5 minutes worth of warm up on 30 degree mornings. This is the first time I've paid attention to the mileage number but that's ridiculous. The owners manual says that's less mileage than the "extreme" category and I would say my driving conditions are maybe between normal and severe.

So much for being "intelligent" I think I'll go back to the old method of tracking mileage.
 

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10,000 mile intervals, no problem. I haven't done any towing, and I would call me driving "normal"

I'm just coming onto 20k and the oil life indicator is right on the money for another 10k interval.
 

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My oil monitor went bad in my 2010 Grand Marquis, was giving me a change oil soon message in about one third of the normal time. I had to ignore it and go back to mileage counting. Also my 2013 F150 is my back up truck and time is causing the change oil soon message so I am ignoring it as well.
 

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@Jdbronco - there have been a few threads on this previously (see: Survey: First oil change mileage/% Oil Life remaining) and I too was initially concerned that I was only seeing about 2500-3000 mile interval for my first two (2) oil changes. I am now in the group that struggles to reach the 5K oil change intervals that I bought as part of my ESP (Extended Service Plan) but only because I have taken corrective action to ensure that I meet that 5K interval. Let me explain a bit....

My driving is what I call primarily "city" driving, as I don't take an interstate to work, but the roads I take vary between 40 MPH to 55MPH, so I can get up to highway speeds on my commute. I have maybe a half dozen traffic lights on the drive, so it is definitely not stop-and-go but those can slow me down. My commute is roughly 20 miles round trip and I find that my truck is just getting to ideal operating conditions (engine oil @ 200F and EGTs @ 600F) before I need to shut off the engine after arriving at my destination. My belief is that my daily commute is what contributes to what I consider more frequent oil change intervals.

I think your simple description of "easy city driving" could explain for your 2500 mile oil change interval, as these engines prefer long runs of highway mileage with the engine operating at optimal conditions (described above) so that you get "Passive" regeneration; i.e. the engine is running hot enough that it is producing very little soot to fill the DPF. If your driving style/habit is lots of short commutes (15 minutes or less) where the engine never gets to the operating conditions where passive regeneration can occur, then your DPF fills quicker as it is trapping any unburnt fuel, which is primarily what soot is...

I am going to fathom a guess that you have not enabled the DPF % Full view in your IPC via FORScan programming. Couple your "easy city driving" driving style (with very little if any passive regeneration) with no monitoring of DPF % Full, I am going to guess again you are in what I have termed the "DPF death spiral" where you DPF "active" regens never fully clean the DPF Filter down to 0% full (empty) and your DPF is always in a near full state. If your DPF is operating in a near full state, you are putting more exhaust back pressure on the engine, forcing more of the dirty intake air (due to the EGR system that recycles the exhaust back into the intake) past the rings and into the engine oil. The Oil Minder is taking into account average driving distances, average time your truck is in a state for passive regens, and average mileage in between active regens to come up with the oil change interval recommendation.

To combat the DPF death spiral, I monitor my DPF % Full in my IPC and take my truck on a 20 minute/20 mile DPF "blow-out" run when I hit DPF 100% Full where I ensure any active regens get me back down to 0% Full. Using this technique in addition to my normal commute along with an occasional highway trip > 100 miles has extended my oil change intervals to 5000 miles and above. Altering your driving schedule for the sake of diesel ownership is not something I intended when purchasing my F150 PS Diesel, but it has become a necessary evil if I want to track to a 5K oil change interval.

There is another set of owners here that will tell you they are tracking to the 10K oil change interval and others are in between 5K and 10K intervals, so longer intervals are possible, and I believe we concluded that driving patterns (stretches of uninterrupted driving at higher speeds for longer durations) and biodiesel are the biggest contributors to longer oil change intervals.

All of the above is not something that was common knowledge or something I knew from prior diesel ownership or before purchasing my F150 PS Diesel, but rather what we here as a group collectively determined over a period of time via close FORScan monitoring, which you can see evolving in the following thread: Stuck in regen??? I strongly suggest you read thru this thread in its entirety to explain what I have tried to summarize (albeit poorly) above and come back here with any questions that you might have.
 

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Discussion Starter #5
Thanks for the detailed response. I had remembered reading some posts about lower oil change intervals but I thought I had remembered closer to 5000 miles. Your driving profile sounds very similar to mine. I do have DPF% enabled and I generally only get it down to about 50% at a time so that is probably not helping. The title of that post is deceiving, I would've never know oil life was discussed. I'll go back an read it.
I was just shocked to see that the owners manual mentions nothing about that in their driving categories. Although they do go to the detail of telling you if the monitor is accidentally reset or not work to change at 5000 miles... Go figure.
 
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