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Message: [QUOTE="doo dah, post: 1407988, member: 22536"] Blackstone analysis came back high in Potassium and Sodium with antifreeze % at .58. Is it possible something got in when the turbo was installed (EGR, CCV, etc...removed/disabled)? I am going to run another analysis but wonder if I am getting coolant in do I replace head gaskets now or monitor at each change, and if I monitor at what level do I park it and get the heads done? I have 186,000 on the truck and the oil sample had 7500 miles on it. Rotella T6 with amzoil bypass system and Zmax, This was the statement; ERIC: These results may not be what you were hoping for. There's a lot of potassium and sodium in this sample, and those are both markers for coolant contamination. The additive you mentioned is solvent-based and it probably cooked off, so it shouldn't be influencing these results. Copper shows wear at brass/bronze parts compared to universal averages, which show typical wear for this type of engine after about 6,500 miles of oil use. The trace of fuel is fine and the TBN is strong at 8.6, but use just 5,000 miles next and watch for coolant loss. Check back to monitor. [/QUOTE]

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