Mobil 1 15w 50, this is what I just switched to and it seems to work pretty good. Before I had a little ticking sound in the upper end and now its gone and it shifts and runs awesome!! Starts up and purrz like a kitten.....
Just my experience though...
not meanin' to dis you Quazy Moto....hee hee hee, sorry , but I would personally not be pleased that any type,brand,weight of oil cured my ENGINE NOISES .
Rev, I have access to brands here, that you may not have there....an' visa-versa .
bottom line , for me anyway, oil breaks down so quickly,an' gets dirty almost instantly,that frequent changes are more important that type . Synth is gr8,especially if its allowing yer clutch to grab fully. It still needs changing thou.If you can afford to dump yer synth on a regular basis I say "Go-4-It" . I use an oil that costs me 12 dollars a quart. Big dough doesn't mean BIG GO . I just hope it means LONGEVITY .
Strayin too far from what the maker uses [10/40] I dunno.
Certainly in yer hot weather extreme, something thicker cant hurt .
Don't even get me started on filters....
They're WORTHLESS....for the most part .
Have a good 1 Rev.... RSD.