Originally Posted By: Analyzer
Originally Posted By: ZeeOSix
Anyone here use either of these Castrol Motorcycle Oils? Both have JASO MA-2 ratings. Many user reviews of the full synthetic say the transmission shifts better than with other full synthetics like Mobil 1. I was thinking of trying the Castrol 10W-40 in the XSR900 next oil change.
Full Synthetic
Semi Synthetic
I have used the Castrol Actevo once before but never noticed any difference/improvement in shifting. Although a VOA doesn't reveal the complete picture of the additive package used, the analysis looked more similar to a typical PCMO than anything. You could run with the Yamalube 10W40 standard petroleum oil that would qualify you for their 20 year/100,000 mile limited engine warranty as well. I know the Castrol Actevo can be picked up at Walmart for roughly the same price as the standard Yamalube (with the Actevo being a Semi-Synthetic which is a bonus, and being at a competitive price point).
If I needed a Jaso oil I would not hesitate to use it. Unknown to a lot of people in these forums Castrol Motorcycle oil is one a few truly few CERTIFIED Jaso Oils discussed here.
Mobile 1 is not Jaso Certified, only claims to meet Jaso, if that.
Just because an oil is not "certified" doesnt mean anything bad, your just placing your trust in the oil company to being truthful.
)
But could you imagine the people in the Automobile and Diesel Forums above using oil not Certified by the API or ACEA? It wouldnt happen, but we do it in our bikes for some reason.
Anyway, again, to your question, I think you are doing good, choosing an actual "certified" oil with the Official Jaso Symbol/Stamp on the back.