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?
Is this a worthwhile discussion?