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Originally Posted by John V
My iron jumped to 21 on the last analysis that I did. But again, this oil had a very hard life, two SCCA ProSolos in extreme heat, a national tour plus several local autocrosses. So given all that, I'm extremely happy with the wear behavior.
Attached is my oil report showing my last two oil changes.
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That looks great especially considering the harder driving and the fact that the "universal averages" are for a 4000 mile interval! Viscosity is low which is consitent with the other M1 tests I have seen. It is this thinning effect that makes me want to try a 5W40.
Buster at BITOG revived this interesting redline 5w40 post on a VW 1.8 tubo that was driven hard.
http://www.bobistheoilguy.com/forums/ubbthreads.php?ubb=showflat&Number=221789&fpart
p.s. I am no redline fanboy but I am very interested in finding the best oil, whatever that may be.