Will this keep Mr BMW happy do you think?
The question is mayby not if it makes Mr. BMW happy or not but: "Will it preserve the warranty promise of your bikes manufacturer?"
My simple answer would be YES, it does.
Amsoil claims the oil to meet all requirments in the technical section of the bikes rider's manual:
- the oil's viscocity is 15W-50
- it's made to meet API Service Classification SM (better than SJ, as required by BMW)
- it meets JASO MA2 standard
If it's a good or bad oil for you, is not for me to say. Only time will tell. A good advice about motorcycle oils could be found the on web pages of "[URL="http://www.pqiamerica.com/resourceroom/apiserviceclass.html"]The Petroleum Quality Institute of America[/URL]", they state: "Some Engine Oils Currently on the Shelves Can Harm Your Engine [B]Read the Labels![/B]"
An interesting article about JASO motorcycle oils could be found [URL="https://www.whitedogbikes.com/whitedogblog/choosing-the-right-motorbike-oil-what-does-jaso-and-jaso-ma2-mean/"]here[/URL].
Does your dealers recomendation to use "any 10W-40 oil" meet the requirments? My answer would be NO. Therefore it's questionable that your dealer recommends such an action.
This is ofcourse only my look at your case, for you to use as you please. Bear in mind, I'm no oil expert or anything but an old fart who's been some decades in the sadle. You may take my writing as you please and do what ever you like with it.