break-in period
When you get a brand‑new car, the engine needs some time to settle. During this first few hundred miles you should avoid hard driving so the parts can get used correctly.
The break-in period is the initial phase after a new engine or transmission is first used, during which it should be run gently to allow components to wear in properly.
Hear It Discussed
"[1507.8s] and I assume it's the same for the Explorer, [1510.3s] it says for the first 500 to 1,000 miles, [1513.4s] don't drive at sustained high speeds. [1532.4s] So whatever it is, you're..."
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"“...and so this first like 20 30 miles that i was just waiting for the shoe to drop yeah waiting for something but it just just it just sang right...”"
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"I had it overhauled and then about, I'd say, 1,800 miles into the break-in period it started overheating."
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