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High potassium and sodium in oil sample

The last 4 oil samples I've had ran have shown high Potassium (40-44) and high sodium levels (108-95) but no Glycol. I do have to add a gallon of anti-freeze every few weeks mainly do to a few cold leaks. The engine is a 07 Cat C-15 with 900,000 miles. My mechanic says it could be anything from a bad head gasket to a leaky oil cooler. Any ideas on what I need to do now?

Thanks

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You have a coolant leak. A lot of the times the glycol doesn't show up. The potassium and sodium are classic signs of antifreeze in your oil.

You need to get in to the shop and find out where it is coming from. You have gone long enough with the coolant in the oil. Not sure which is the most likely cause but you need to find it ASAP before it does to much damage to the internal engine parts.

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i had the same problem and it turned out to be a leaking egr cooler. put it in the shop and tell them to check for a leak. and yes its goanna cost...

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Most likely coolant leak somewhere, fix ASAP

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had the same thing oil sample came back the same was told that the egr cooler was going to go

will today i just had to replace the egr cooler

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My “CASHcadia” has the same problem. My oil sample came back as follows:

All wear rates normal. Sodium and potassium levels indicate internal coolant leak. Water content acceptable. Viscosity within specified operating range. Action: Check for source of coolant leak and repair. As oil and filter(s) already changed, Resample at a reduced service interval to further monitor.

My engine is a Detroit DD-15 with only 32K on an inframe. Loosing 1/2 gallon coolant around 4000 miles. Removed EGR pipe (drivers side) and checked for moisture in pipe hoping it is a leaking EGR cooler, but pipe was dry with normal soot.

Praying it is not a cracked head or something major. This truck has robbed me and my family with repair bills. I call it a “CASHcadia” because it will take all your cash!!

Freightliner dealer did the inframe, and said head looked good, so did not replace it. Can’t imagine head gasket leaking at 32K miles…

Any suggestions?

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Brian Powell will be eternally grateful.
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