Quote:
Originally Posted by Speedy1975
OK? I don't follow your point. I know almost no one that follows those break-in procedures and their cars aren't self destructing years later. So like you said to each their own. There is an alternate train of thought that believes hard driving right form the get go is better for the mechanics and insures optimal performance.
I can invision how that engineering meeting goes -
Engineer 1 - what should we use for a break-in process on this car?
Engineer 2 - just cut and paste something from another car, doesn't really make any difference but some consumers feel better having one to follow.
Engineer 1 - done, what's for lunch
LOL
I used to think like you did until I started working on cars, having motors built, etc. Then I realized they get thrashed on the dyno during tuning making any break-in outside of varying the RPMs a bit for the first 500 miles a moot point.
I've got a 02' 4Runner that I bought used with 12K miles on it (lease turn in) that I can all but guarantee no break-in procedure was followed. I supercharged it at 60K miles 7 years ago and at about 120K miles on the clock it hasn't had a single issue and doesn't burn a drop of oil.
Shall we keep going or just agree to disagree?
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The same debate rages on in every single forum involving things with a motor. It is usually a case of dueling anecdotes.
Of course, when building up a motor yourself or having a custom shop do it, there is likely more care taken in fit and assembly lube than on something half assembled by robots on a factory line, so it stands to reason that the problems encountered during the motor's early life may differ.
Car companies want to pay out as few warranty repair dollars as possible. Break-in procedures are purposefully designed to bring the need for warranty repairs down as low as possible. It is about dollars and cents and is that simple.
In the end, it is a personal choice on how we break in our motors.