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New car engine break-in?
We purchased a 2012 Nissan Frontier 2 weeks ago. The dealer had to locate one which was 140 miles away. He had it driven to the dealership .
I asked him about driving it all that way ( mostly highway ) if it would effect the break-in. The service manager told me it would have no effect at all. When i got into my owners manual i states to not to keep the engine at one constant speed for any length of time for the first 1200 miles.. For it could hurt the performance and or economy of the motor.
right now I'm averaging 12 miles to the gallon where i should be averaging 16-17. And not too happy about it right now.
Just like some input with engine break-n and mileage.
4 Answers
- Really ?Lv 79 years agoFavorite Answer
Today cars do not require break in like the olds one... just take it and drive.
- the_boy_toyLv 79 years ago
The manual means a constant speed for like over 500 miles. That short drive should not and will not effect the performance of an engine. The economy of the engine will vary for the first 5000 miles (approximate) until all of the seals seat. Unfortunately, the 16-17 mpg is estimated and should not be considered actual. That vehicle will probably only get 14 mpg at most.
Source(s): 30 yrs home mech and Mech Eng - AndrewLv 49 years ago
The owners manual tells you to do that because it takes a little while to for the computer to learn the optimum settings for air/fuel ratio, etc. 140 miles isn't much comparatively speaking to the 1200. That's only for a long trip vehicle. Give it time.
