The proper engine break-in procedure is a test run at ______.
A)constant 30 mph (48 km/h)
B)10 mph (16 km/h)and acceleration to 30 mph (48 km/h)
C)constant 60 mph (96 km/h)highway speed
D)30 mph (48 km/h)and acceleration to 50 mph (80 km/h)

Name: The proper engine break-in procedure is a test run at ______. A)constant 30 mph (48 km/h) B)10 mph (16 km/h)and acceleration to 30 mph (48 km/h) C)constant 60 mph (96 km/h)highway speed D)30 mph (48 km/h)and acceleration to 50 mph (80 km/h)
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Question

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The Answer is D

The Proper Engine Break-In Procedure Is a Test Run at ______