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What does lead in engine oil mean?
I had an oil sample from my car analyzed and just got the results back. Everything appears to be normal except for a high concentration of lead. Is this a problem that I should have treated by a mechanic? What does it mean to have lead in engine oil?
Kara Vanderbeek · Updated on
Reviewed by Shannon Martin, Licensed Insurance Agent.
There are a number of possible explanations for the increased levels of lead in yourengine oil, but generally speaking, your car will not require additional maintenance.
In most cases, high lead concentrations in an oil analysis report indicate that the bearing is wearing down. Lead is an expected metal in any car using a plain bearing and typically doesn’t require any immediate corrective action.
Another possible explanation is that the lead leached from the solder. In this case, there would likely be an increase in the acid concentration as well. This can be fixed by simply changing the fluid.
If you have ever used a lead-based anti-seize compound, it may have dissolved into the oil, which would be harmless to your vehicle. Finally, the lead may have appeared from the use of aftermarket fuel additives, such as octane boosters.
Understanding the unique cause of the oil analysis result will depend on what components of your vehicle utilize lead. If your car begins to demonstrate any uncharacteristic symptoms, have a professional mechanic inspect your oil. Otherwise, the lead in your oil analysis should be no major cause for concern.
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