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I have a new 2017 F250 6.7 diesel. At about 6,500 miles, without any indication from the truck that I needed an oil change, I changed the oil and filter. I used Rotella T6 full synthetic.
Today, with 9,500 miles on the truck, the “change engine oil soon” message came on on the dash. I would guess I have towed my Airstream about 1,200 of those miles.
I thought the Ford system is suppose to analyze the oil? I’m suspicious that the message came up at 9,500....seems like a 10,000 mile indicator.
Do you have FORSCAN? Pull the "miles since last oil change" PID. That'll confirm if it is just a matter of forgetting to reset, or if you need to look across other oil parameters for dilution, etc.
You need to rest it as stated so the truck knows you changed it. Then it will restart its tracking for the next oil change. It is all in your manual.. you know that book you get with the truck lol.
It does not analyze the actual oil but it does monitor many different things (idle time, rpm, hours, miles etc and more.)
If he didn’t reset it I would think the messages would be constantly popping up. They first start with change engine oil soon, then they say change engine oil now.
also, OP, the oil isn’t analyzed Chemically, just the circumstances that the truck goes through. Do you idle a lot also? You may be towing and using the truck in what is considered severe conditions.
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