Quote:
Originally Posted by Maxim
I saw somebody say something about not needing to let a car warm up anymore.
This is NOT true. You absolutely need to let a car warm up still. Think about it. Oil that is not warm is much thicker....using high revs on a cold engine is definitely bad for it, it stresses all the components far more than once the oil is hot.
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And the best way to warm 'em up is to drive them gently for ~3-5miles until oil gets to temp.
I've always heard hard break-in is the best, for numerous reasons. They've all been mentioned already so I won't go into it. However, the previous poster brings up a good point with other wear items that need to be broken-in. The manual probably has a blanket break in period for as long as it does because it needs to cater to the lowest common denominator; there are things like clutches and brakes that you should be gentle with (if you're gentle with the engine you should consequently be gentle with these as well) before they're ready for use.