Interesting, particularly ..
Quote:
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Originally Posted by Preliminary conclusions
4.The viscosity of petroleum-based oils, whether designed for auto or motorcycle application, drop at approximately the same rate when used in a motorcycle.
5.There is no evidence that motorcycle-specific oils out-perform their automotive counterparts in viscosity retention when used in a motorcycle.
These last two results (4-5) definitely do not agree with what the motorcycle oil producers have been telling us. In fact the test results not only indicate the two motorcycle oils being outperformed in viscosity retention by the two automotive synthetic products. but even by the relatively inexpensive Castrol GTX, which is a petroleum product. This directly contradicts the advertising claims made by the motorcycle oil producers.
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However it's a shame they didn't test motorcycle specific oils from Castrol and Mobil to make a more direct comparison.
However I guess nobody wants to risk trashing their engine, so for me the not too overpriced motorcycle specific oil makes sense.