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Old 05-03-2019, 04:09 PM
Purplefade Purplefade is offline
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New N63 Engine - Worse gas mileage?

Hey Tallen234,
In my years of building and rebuilding engines I always find that a new, “tight” engine takes some miles to break in and achieve its best (gas mileage) performance.

My guess, within probably 10k +\- miles that you’ll notice the engine starts to “loosen up” and you see that gas mileage go up a bit [emoji106]
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