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Old 12-23-2012, 10:14 AM   #219
Guzzi 1
Scooby Newbie
 
Member#: 338666
Join Date: Nov 2012
Chapter/Region: MWSOC
Location: Northeast Ohio
Vehicle:
2014 Impreza Limited
SWP/Blk Leather CVT

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I've read through some of this, but there are so many variables it would still be hard to nail down. Simply stated, the general rule to proper (recomended) break in is to vary engine speed and load. Don't over rev the engine. Using cruise or not and AC is simply BS. IF your driving includes hilly roads, CC will still vary engine speed and to a degree engine load. (Engine load more so on a stick.) That is the actual idea. Not only getting mating parts to wear in, but heat and cold cycles to "season" the metal. If you're varying the load and varying the engine rpm's, them you're probably doing what you're supposed to, regardless of weather or not you're using cruise or ac.

I have also heard over the years that some people recomend "driving it like you stole it" to break in an engine. I personally don't agree with that and prefer to keep with what the manufacturer suggests.

So, I varied load and engine speed, but used CC and AC when I wanted to.

John
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