Which risk increases when an internal combustion engine piston experiences 'piston slap' after initial startup?

💡 Explanation

When piston slap occurs in a cold start engine, excessive clearance causes the piston to impact the cylinder wall, inducing ring flutter because of the tilting and instability, increasing oil passage into the combustion chamber. Therefore elevated oil consumption results, rather than high Nox, bearing failure, or turbo damage requiring different causes.

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