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[Solved] Chrome(12) in oil test


Topic starter

06 Nissan Armada 170K miles,original owner,passenger side cat has been replaced at 150K and secondary cleaned.

No engine fault codes.

170K oil test showed 12 for chrome ,highlighted by testing facility-all else good.

Should I be worried?


2 Answers

It could be an aluminum engine block with stainless steel linings in the cylinder walls. I can't think of any other possibilities that might involve stainless steel, it's too expensive to make an engine out of without costing a fortune. If that's the case, it's just normal wear, I would think. 

This post was modified 3 weeks ago 2 times by Justin Shepherd

It indicates possible piston ring or valve wear. However you need to interpret that in relation to other metals found and need more than one test to see a pattern.