These 15W40 HDEO oils are real tough oils. After much research on this site and others I switched both of my BMWs (R1200RT and R1200GS) to Delvac. Two seasons now with running out to Oregon a few weeks ago and little consumption and engine temps stayed moderate through out a hot 4,700 mile run. Going to run up around Lake Superior in late October and hit temps down to 25 degrees at start up near Duluth last fall. Easy starting and runs well at high temps. I know the Beemers don't share a transmission in the sump, but air/oil cooled nontheless.