That Ferrari forum is very good read. Makes sense what the man writes.
@dr Motorbreath: I believe full synth API SM (or higher) JASO MA2 oil is better than any mineral oil for your motorcycle.
Please do not call me doctor, I'm starting mechanics studies, maybe just nurse?
. In fact the new castrol mineral I'm using now is 20w50 is API SJ and JASO MA2. I've also read that higher than SG or SJ, I do not remember exactly, has nothing to do to its lubricating qualities but preserving the new catalityc converters, removing some nice substances actually.
Those old FZR/YZF 1000 engines drink oil due to huge tolerances between engine parts, so everybody uses mineral for them. The text I mentioned was written by an argentine Yamaha mechanic and he said that even the R1 engines from a few years ago had very "old time" tolerances between parts. But it is the internet, maybe it was all bulls*it.
I've read on the internet a couple of guys who say they are mechanics telling that they have received advise from Yamaha and Honda to employ just mineral oil even on newer R1 or R6, and just mineral or semi for CBR. I do not remember where and they were at spanish and argentina sites anyway.
Every mechanic recommends mineral on my Thunderace, it seems to transform into a 2-stroke engine otherwise.
Yamalube motorcycle oil comes in semi and fully synthetic. So, ?
Yeah, same thoughts for me. Who knows, maybe that info wasn't right, maybe it is just for marketing or track. But I took a look at a 2008 R1 manual and it still recommends ancient oils for it.