Oil Weight ??

[hammer]

It's been more than 15 years for me since first getting into oil topics. I appreciate what snarleybill has to say, I have been on the site he mentions and too many more. So far I have not been able to find where oil companies can tell you what is different about their motorcycle specific oils and they probably can't. I wish I could find the document I did get but it basically said there was little or no difference in the Mobile 1 MC specific oil and the 15/50 RedCap (now grey cap) in similar viscosity automotive oil and the same is largely true of others that do not have anything in the energy conserving bottom half of the circle. If you go back far enough Castrol GTX then Red Cap then Rotella, etc., became popular for the same reasons. The bottom line is most manufacturers will not be motivated to put Jaso on an oil if they can make all the extra money by selling it at 4 times the price as MC specific. For the most part, IMO of course, it's just a waste of money.
I can hardly believe it showed up on the new T6 as I am sure there is far more of it flowing through long haul trunk engines than motorcycles. Bonus.