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Maintenance & Repair Synthetic motor oil
8536 messages, Last post on Nov 21, 2009 at 9:34 AM
You are in the Maintenance & Repair Forum. Your Host is mr_shiftright
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Replying to: Mr_Shiftright (Nov 02, 2007 7:55 am)   I can put these answers in context for those who would like to provide the context, or if folks want to know in what context I apply the information ! Please explain the old "more is always better" argument?
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Replying to: Mr_Shiftright (Nov 02, 2007 7:55 am) Contaminants levels in the used oil are lower than most other reported results (by other vehicle owners) with a third of the miles driven. After OCI's of 12 to 15K miles my results are consistently better than other reports with 5K miles or less. This does not mean that the oil is fit for longer intervals simply because the TBN is low enough to warrant a change. What I am trying to say is that based on that personal experience I venture to guess that the engines in my cars will last a lot longer than average. Will I reap the benefit of a longer engine life in my cars? Probably not because I sell them usually around the 300K mile mark. A trucking company or a taxi cab company may be able to tell whether a difference in engine wear is measurable for higher mileages. They would know if there is a payback or not for the investment.
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Replying to: pulgo (Nov 02, 2007 10:30 am) Another example is the change from LSD (up to 500 ppm) to ULSD (15 ppm on down) The TBN, (12 in the case of Delvac One 5w40 aka Mobil One Truck & SUV 5w40), not 6 mo ago was a VERY important measure: while still important, another important metric was, still is the SOOT LOADING 1.5-3% upper level); to the TBN. So if you got soot loading (for any number of reasons) it was important to have a good (reserve) TBN to neutralize acid production due to soot loading. Since soot loading is/was caused primary by higher sulfur PPM, what does one think happens to the soot loading metric when soot is now structurally 97% LESS?? !!! Again a reason why TBN (using ULSD) lasts/stays higher so much longer! So for example a high quality oil (Delvac One 5w40, aka Mobil One Truck and SUV 5w40) was almost total overkill for a 10,000 mile OCI, was a lock for a 20,000 mile OCI with LSD. Now with 97% less sulfur ppm, a 25,000 mile OCI is a belt and suspenders kind of interval!! This is without bypass oil filtration!! If one adds bypass oil filtration:? CLEAN CLEAN CLEAN, longer longer longer. Can I go to 500,000 to 1,000,000 miles? Those are my goals, and time will tell. Can it go to 500,000 miles to 1,000,000 miles with bypass oil filters? That would also be the goal and time will tell, also. What I do know for sure: if I keep the OCI's the same (25,000 miles), the oil with the bypass oil filtration will indeed be cleaner. Do I think it makes a difference? Absolutely!! Do I think it is statistically significant? Probably. Has it been positively correlated?.... NO! Does either scenario make longer term economic sense? I hope so. I know logically, but truly, I do not really know practially. All we can reasonably expect to do is given the goal, stack the odds in ones' favor!? |
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Replying to: ruking1 (Nov 02, 2007 8:54 am) |
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Replying to: ruking1 (Oct 31, 2007 7:21 am)
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Replying to: robert1955 (Nov 02, 2007 12:27 pm)
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Replying to: ruking1 (Nov 02, 2007 2:03 pm)
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Replying to: pulgo (Nov 02, 2007 10:30 am) Best Regards, Shipo |
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Replying to: robert1955 (Nov 02, 2007 2:54 pm) |
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Replying to: shipo (Oct 20, 2007 1:06 pm) How will you use a Pella if the trend to omit the dipstick really takes hold? Are you still moving to Hong Kong?
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