This is what I have started useing....
Austrailin made oil....

http://www.penriteoil.com.au/product...d_products=597




...

I have sent an e mail to Castrol to hear what they say about it
Looks like this is what they recommend

https://c2.staticflickr.com/6/5534/3...3d22b66e_z.jpg

Act>evo is the one which is matches the recommended spec by Yamaha, but either would be perfectly suitable. Both are JASO-MA2 standard oils.

Be interesting to see what Castrol say about the Magnatec when they reply to your email...

Goodness Pleiades, your words and advice are very very balanced and intelligent, thank you. Over my 35 ish years of bike ownership I have always sought to use only JASO approved engine oil and usually I have kept to a single brand, and I have never had any problems. I was a Castrol man, more recently I have started using Bardahl, but I think that the brand is relative (I think that Yamalube is made by Motul??) the important point is to change it frequently AND of course to use the correct motorcycle oil.

Castrol not happy with Magnatec in bike, no problem on the wet clutch, but it's not a motorcycle oil, apart from that they (he) could not give me more value added info
Also spoke to motorbike mechanic that's quite a specialist, he says that the magnatec can't damage the clutch but he found engines with magnatec, has like a varnished finish to it when opened, he can see it a mile away, not keen on it
I can just say that the magnatec is not a cheap oil, so never my intention to try cheap oil, was advised that the 10W-40 is what's needed and thought that magnatec can add value, indeed not so

Going to drain oil and replace with this

https://c8.staticflickr.com/6/5797/3...007d5abe_z.jpg

Hiya, just check that this oil has the JASO spec and then all is good!!! I did not know they made oil, I thought just additives.....

https://c7.staticflickr.com/6/5834/3...1741687635.jpg

Very well said, Pleiades!

Gears, clutch and higher revs are the main differentiators with car oils. But to the point, there are enough good AND cheap motorcycle oils around to f**k around with car or other oils.

That doesn't surprise me at all!

Stick to JASO MA2. You know what you're getting, so you can't really go wrong.