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Old 01-08-2018, 07:04 PM   #1
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2018 questions

I just traded my 2009 3500 for a new 2018 3500.
I notice that the new one has 2 screens ( can't call them gages) one is the fuel filter life and the other is the oil life.

Now the fuel filter I can kind of understand how it is determined by measuring the PSI on each side of the filter and when restriction is at a certain point say that it should be replaced.

But how is oil life determined?

I'm guessing at run hours and starts?
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Old 01-09-2018, 12:04 AM   #2
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I am not sure how it works but if it's similar to what gm has it's a sensor in the oil pan. GM has had them in vehicles for 10 years or more.
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Old 01-11-2018, 07:08 AM   #3
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Both the oil and fuel filter life are based of algorithms, starts, run cycles, mileage, hours, idle time, etc.

There are no pressure sensors, heck even your oil pressure is a dummy made up pressure.
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Old 01-14-2018, 08:06 PM   #4
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I think I'm getting old . it seems that the fuel filter would be simpler with PSI sensor's but who am I to out think a over paid engineer that needs to make things complicated so he/she can keep their job.

As for the oil life thank you at least I know a little about what is happening now.
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