Quote:
Originally Posted by lickitysplit
I do this during break ins (vary the rpm). I've heard it's better for the cylinder walls. This will be the third new car I will do this on. But as stated earlier, there are many different theories on what to do, if anything.
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There may be a lot of "theories" out there but they are all wrong.
Subaru recommended break in is required for long engine life and good performance.
Anyone who suggests otherwise is just wrong. Period.