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Old 07-16-2016, 06:57 AM   #71
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Both the newer gas and diesel stay a lot cleaner since they don't get an excessive amount of fuel dumped in them.
Yup, It makes a difference.
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Old 07-16-2016, 08:09 AM   #72
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A lot of good information and a variety of opinions regarding oil changes so here's a question for.

I don't put a lot of miles on my 6.7 so I should change every 12 months

My question is if I change before going into storage and don't use it for the 12 month period, do I change the oil again?
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Old 07-16-2016, 08:31 AM   #73
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A lot of good information and a variety of opinions regarding oil changes so here's a question for.
That's why iRV2 works for a lot of folks.

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I don't put a lot of miles on my 6.7 so I should change every 12 months
We spoke about this earlier and the consensus is yes as opposed to the OP statement. In my opinion, the rule of thumb for all diesel owners should be to run it like you stole it. Low miles on a HD RDP engine, in time, may not be a sustainable strategy.

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My question is if I change before going into storage and don't use it for the 12 month period, do I change the oil again?
When I was storing my rig over the winter, I would dump the oil in an effort to get rid of any contaminants. Once the new load of oil was in there, I'd run the engine to check for leaks and then I would shut it down and walk away. In the spring, there may be trace condensation in the crankcase however if you get in your rig and get on the road, this contaminant will boil off. I would much rather start off with clean oil than have the old load sit in the pan and engine for 12 months.
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Old 07-16-2016, 10:56 AM   #74
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A lot of good information and a variety of opinions regarding oil changes so here's a question for.

I don't put a lot of miles on my 6.7 so I should change every 12 months

My question is if I change before going into storage and don't use it for the 12 month period, do I change the oil again?
I do ours once a year (5-6k miles) geny gets it twice, call it waste if you want, I call it cheap insurance.....I change before our season, May-April
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Old 07-16-2016, 11:02 AM   #75
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Both the newer gas and diesel stay a lot cleaner since they don't get an excessive amount of fuel dumped in them.
Some of the newer diesels dump copious amounts of fuel into the engine during regeneration. Some of that fuel finds its way into the oil, and it turns black in short order.
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Old 07-16-2016, 11:31 AM   #76
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Some of the newer diesels dump copious amounts of fuel into the engine during regeneration. Some of that fuel finds its way into the oil, and it turns black in short order.
Correct, I was referring to mine, 2005, ECM as opposed to the Old school DI.
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Old 07-16-2016, 11:40 AM   #77
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Its soot from the smog system causing the oil to go black so soon. Not fuel.
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Old 07-16-2016, 11:54 AM   #78
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Its soot from the smog system causing the oil to go black so soon. Not fuel.
Some late model diesel's use fuel to clean the DPF and not DEF. the excess fuel washes down the cyl walls and the oil is contaminated with fuel, sometimes as much as two three liters of "extra" oil is drained from the crankcase.
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Old 07-16-2016, 12:24 PM   #79
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Actually, regeneration elevates exhaust temperature, in conjunction with an extra fuel injector in the exhaust stream that injects fuel to react with a catalyst element to burn off accumulated soot in the DPF filter.
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Old 07-16-2016, 03:20 PM   #80
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Actually, regeneration elevates exhaust temperature, in conjunction with an extra fuel injector in the exhaust stream that injects fuel to react with a catalyst element to burn off accumulated soot in the DPF filter.
Ford has no injector in the exhaust, they inject the regen fuel into the engine and it then goes out the exhaust valve to be burned downstream
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Old 07-16-2016, 04:07 PM   #81
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I guess that would explain making oil or "extra oil" as mentioned above.
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Old 07-17-2016, 06:08 AM   #82
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I guess that would explain making oil or "extra oil" as mentioned above.
The old DI Injectors would "make oil" when going bad also.
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Old 07-17-2016, 07:10 AM   #83
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Big Oil says motor oil shelf life is 5 years--google shelf life for motor oil and you'll find that Big Oil says that motor oil shelf life is at least 5 years. Given that Big Oil is saying this you know its probably much longer than that given their lack of credibility to begin with. So, I think its safe to say that you could go significantly longer than one year on low mileage oil changes. Caterpillar says 15,000 miles is the factory recommended distance between oil changes on my C-10 diesel engine. Thus I change its oil every two years or 10,000 miles which ever comes first. To change 34 quarts of oil annually just because 12 months have gone by, irrespecutful of miles accumulated, is wasteful and frankly, irresponsible.

I think it says 15,000 miles or annual its my understanding that cat heui pumps like clean oil this is one of those things like driving on tires that age out. What can damages cost? I change my c-9 which holds 34 quarts also annually, it's worth a piece of mind for me. What does shelf life have to do with it once you run it in a engine and adding contaminates to it, (irresponsible) you can look at it either way it's yours to each there on.
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Old 07-17-2016, 08:48 AM   #84
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We recently took delivery of our London Aire with the ISX 15. Cummins says to change the oil based on mileage, which we'll never reach, or time - every 6 months! That's 14 gallons plus filters every 6 months.
So far no one has been able to tell me why. I spoke to a Cummins rep at an FMCA rally and reading his body language I suspect he feels that's overkill too, but his official response was something like; "our engineers have determined for optimal blah, blah, blah".
Our routine with the ISL equipped Revolution was once per year (usually around 6,000 miles). I'd have it done in Orlando on our way down for the winter, where the coach is used less (maybe 500 to 1,000 miles before we head back north). I have an appointment at Spartan at around the six month time since delivery and mentioned this to them, the service writer said they'd do some fluids test, but normally wouldn't expect to change the oil at six months, based on time alone. I still have to call and have a conversation with Cummins on this. It's time, fuel and money wasted, as far as I'm concerned (the six month interval). I have no problem with the 12 month schedule. I will not start the engine unless we are traveling so I doubt there will be any unusual or excessive build up of contaminates.
For what it's worth. After having the oil changed in our 2010 ISL it would be black again by the time we got to our winter property, about 40 miles down the road. This coach now has just over 2,000 miles on it and the oil is still clear.
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