Quote:
Originally Posted by getnpsi
I think the use of synthetic helps the service life of parts more than the power its freeing up...
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But isn't the reason that it helps service life due to reduced friction?
They say to NOT use syn motor oil in a new motor until the rings have seated. The reason given is that the syn motor oil is so slick the rings will not seat if it is used from the start.
Reduced friction means longer service life, less heat generated and thus less energy required at the input.
I recently changed my manual transmission oil to synthetic and the first thing I noticed is that it shifts much nicer, presumably due to less friction. The dino oil that I drained out was quite new too. It only had 5k miles or so on it.