Last year I discovered this Lucas motor oil and cleared its viscosity with a local dealer. Lucas used to advertise by specific brand for BMW, Moto Guzzi, and H-D. But now just advertises by engine design. I run the bike out here in the foothills in 80 to 90 degree temperatures regularly and have good luck with this oil. It seems to hold up well, and upon oils changes, doesn't look or smell beat up. I also change the oil filter every oil change (WIX). But always looking for what I don't know or haven't heard. Has anyone any experience with this motor oil or oil filter, good or bad?