Quote Originally Posted by Bludger View Post
Super-DA9 knows best about his motor.

his choice to run 15w-50. I have no idea how many km's or what condition his motor is in, so he is best to judge what oil he uses.

We run 10w-60 in one of our b18's and 0w-40 in the dc2r.
Thanks buddy. my engine has 150,000km and has compression test results of 197-200 on all cylinders, however I'm fairly certain the valve guides have a bit of wear on them, which is the reason I use this over 10w-40.

Quote Originally Posted by Egcivicduty View Post
indeed, I think I might go for 10-40 next time
and in regards to da9
its not the change from 10w to 15w that means its a heavier oil
the w stands for something like winter temperature, its measured at 0ºC, its only a grade for starting your engine
the second number is the relative grade of thickness at operating temperature.
so the thickness you are running at the moment is SAE 50, or something like that. You changed from 40-50 lol, i dunno how best to say any of this lol
yeah it seems this is right, my understanding from what I'd learned previously is that the "w" stood for "weight" meaning thickness, but it's good that I understand this properly now. thanks.

not that this would differ my choice of oil, as I've stated the reasons previously. so far I haven't had issues with 15w-50. maybe it would be really bad if we lived in a cold climate? :/