Santa 2512 - is your bike a brand 1250LC. or 1200LC ?
My 2018 GSALC handbook says 5w40 as it does for the 1250 owned by a couple of mates.
However, I have heard of dealers using 15w/50 so not sure why, unless the recommendation has recently been changed.
There follows a section from a previous thread, cannot reference it as it is from a deleted account, but here goes. Ensure the oil is to spec MA2 for the wet clutch.
banshee google says
Product Details
DESCRIPTION
BMW Motorrad’s two new engine oils, ADVANTEC ULTIMATE (this product) and ADVANTEC PRO, are jointly developed and exclusively formulated by Shell lubricants and BMW to demanding and exact specifications for top performance and long service life for BMW Motorrad high-performance engines.
Please Note: ADVANTEC Oils are sold in LITER bottles. 1 Liter = 1.05669 Quarts
Engine oil quality depends largely on its main components: the base oils. They make up approximately 75-90% of engine oil. Original BMW Engine Oils are based on the new patented PurePlus Technology™, which refines base oils from natural gas instead of crude oil. The result is crystal clear base oils that contain virtually none of the impurities found in crude oils. PurePlus Technology™ marks a breakthrough in how engine oils are formulated to provide enhanced viscosity, reduced friction and lower volatility.
Since 2012, BMW Motorrad has re-aligned its published recommendations globally to only two engine oil viscosities for all engine types:
• ADVANTEC ULTIMATE, SAE 5W-40 (API SN/JASO MA2) — recommended for the following 2005 & later models: K1200 RS/S/GT, K1300 S/GT, G450X, HP2 Sport, K1600 GT/GTL, S1000 RR/R/HP4, and all LIQUID-COOLED R1200 Models.
• ADVANTEC PRO, SAE 15W-50 (API SJ/JASO MA2) — recommended for all other models.*
* For owners of what BMW calls “Legacy Motorcycles” (those built prior to 1995) who prefer to continue using a mineral oil based product, BMW continues to offer two viscosities that protect earlier engine designs in most temperature ranges: SAE 10W40 (API SG/JASO MA2) and SAE 20W50 (API SG/JASO MA2