Fair enough, if you've seen an oil passage plugged by the false seals coming loose I respect your position; I have to wonder though in the cases you saw, whether the filters had been changed frequently enough after the flush and change-over. If not, filters clogging with sludge would be a high risk. After filter glogs it lets oil bypass direct, unfiltered into the engine and sludge can get then into and possibly block an oil passage.

Eric: I suggest if you haven't already done so, that you put an oil pressure gage on the engine; If it is low, rebuild the lower end is indicated, or risk short life of everything. if normal pressure, I would go for the engine flush, filter changes and synthetic.

by the way, can you share with us reason for the head rebuild? i.e. Were the cam lobes worn, and noisy or general wear of all parts, badly sludged, head gasket leaking or what? Were the banjo bolts loose? that's a high risk on these big sixes. It starves the valve train of oil and wears it out, while the bottom end remains in good shape. This big six bottom end has a reputation for a long life.

Evan, As for the extended drains, you didn't mention the other components of the extended drains recommended by Amsoil: the oil analysis, finer filtration and only if driving distances are long.

Adjusting drain interval according to oil analysis is also consistent with what the Army Navy, Air force and Marines do on virtually all of their engines in their Joint Oil Analysis Program (JOAP). Also, basing drain intervals on oil analysis is a service that Catepillar tractor company offers and recommends for their customers, by the way, whether synthetic oil or not.

Extended drains don't work well if you are driving short distances. On start up the gas will condense on the walls and gets past the rings into the oil pan. Th more frequent are the starts the more this happens until you have excessive fuel dilution of the oil. In short distance driving the oil won't be at temp long enough to evaporate the fuel out of it, so you ruin the oil film strength with gasoline and get wear. Better change oil often in that case.

But in long distance driving (i.e. overland trucking), you have the opposite situation; in that case as Amsoil has gone to extremes to document, with a properly formulated oil like theirs, It usded to be the case in the 70's and 80's that you could have extended drains of up to 100,000 miles, and still have so little wear that you double time between overhauls. But that is done in combination with oil analysis and extra filtration.

I have participated in test cases of this personally, where we analyzed the oil under controlled tests and with got more than double the drain intervals using Amsoil synthetic 15W-40 marine diesel oil than they were getting with Delo 400 even without any extra filters. We went by the concentration of wear metals.

steve

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• burning oil...options? - ericbruckbauer 2008-06-13 16:36:15 (134 views)
  • Re: burning oil...options? (nt) - stritarja 2008-10-11 21:14:43 (17 views)
  • Re: burning oil...options? - donstevens 2008-09-06 16:37:25 (31 views)
  • Re: burning oil...options? - brkngmd 2008-06-15 20:11:04 (101 views)
    • If he had not already spent money on the new head, I would say go for it... - ejonesie22 2008-06-16 11:01:38 (101 views)
      • Re: If he had not already spent money on the new head, I would say go for it... - brkngmd 2008-06-17 06:50:07 (84 views)
        • Re: If he had not already spent money on the new head, I would say go for it... - ejonesie22 2008-06-17 11:23:25 (80 views)
          • Re: If he had not already spent money on the new head, I would say go for it... - brkngmd 2008-06-18 04:43:33 (65 views)
  • The only true option, finish the rebuild... - ejonesie22 2008-06-15 18:00:48 (85 views)
  • Re: burning oil...options? - brkngmd 2008-06-14 21:59:00 (89 views)
  • Re: burning oil...options? - brkngmd 2008-06-14 17:32:43 (82 views)
    • Re: burning oil...options? - ericbruckbauer 2008-06-14 19:57:22 (71 views)
  • Re: burning oil...options? - strobachyzoo 2008-06-14 09:27:17 (84 views)
  • One good option: Amsoil - brkngmd 2008-06-13 21:30:27 (100 views)
  • Blow by, bypassing the rings as you stated is indicated - kff 2008-06-13 16:44:25 (105 views)
    • It is def. Smoke off throttle. - ericbruckbauer 2008-06-17 09:19:24 (73 views)
      • Could also be through PCV : basic questions - brkngmd 2008-06-18 18:06:57 (85 views)
        • Re: Could also be through PCV : basic questions - ericbruckbauer 2008-06-21 18:57:58 (70 views)
          • I am betting money they used the wrong valve guides for the job or intalled them - Draleu 2008-06-23 01:02:29 (64 views)
          • Re: Could also be through PCV : basic questions - brkngmd 2008-06-21 23:19:52 (77 views)
            • Re: Could also be through PCV : basic questions - ericbruckbauer 2008-07-24 23:13:11 (44 views)