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Does anyone know how the system calculates this? I have 44 hours running and 12 hours idle. I'm not sitting around idling the engine 25% of the time. Thanks
 

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Just seems logical to me that each time you get stuck at a red light or start-up or whatever, the engine idles at something like 800 rpm. Guessing the counter starts "counting" time at that rpm.

Rev the engine and the other counter "counts". Idle is a bummer because it will plug up the particulate filter leading to a forced regeneration. In some diesels it will tend to wash the cylinder walls with fuel and dilute the oil.
 

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Does anyone know how the system calculates this? I have 44 hours running and 12 hours idle. I'm not sitting around idling the engine 25% of the time. Thanks
I know what you mean. I do mostly highway/state rd driving. I do maybe 40% city but there is not a lot of traffic where I live. my truck idles for maybe 30sec when I start it and 3 when I shut it off. I haven't look at my times in awhile but I do remember thinking the idle time seemed high. sort of depressing thinking that many hours of my life I have set at idle.
 
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