Hello Everyone. My bike is a 2015 F800GT. Prior to this oil change I used Motorex 15W50 Boxer 4T motor oil. It’s API designations were SL, SJ, SH, and SG. My bike’s owners manual (From 2015) calls for specifically API SJ oil. Today I used LiquiMoly 15W50 Street 4T motor oil. It’s API designation is only SL. (Not the SJ the owner’s manual specified). It was not until I drained the Motorex oil out that I noticed the API difference. I am sure the LiquiMoly as sold to me by Wunderlich specifically for my bike is fine, but can anyone tell me for our F800 engines, is the API of SL BETTER than SJ? Was the designation of SL around in 2015 when our bikes were produced? Thank you for your responses and thoughts.