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Will break in affect gas mileage?

Updated: 8/17/2019
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15y ago

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There is no real break-in period with the new engines. They all use an alloy of aluminum and silicon (as in quartz) to give ultimate wear resistance to piston rings and all give about 250,000 miles of service. The American made motors give as good if not better performance than that of the foreign competitors. The reduced gas mileage due to tight new motors is near minimum. The lubricants used now are much thinner due to higher tolerance in part wear surfaces and the lubrication is instant from the factory.

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15y ago
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Q: Will break in affect gas mileage?
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