Red Line 20W/50 Motorcycle Oil
For the second best motorcycle oil in this category, here is one that you may be unfamiliar with. It's Red Line 20W/50 MOTORCYCLE OIL. Red Line comes in second to AMSOIL in nearly every engine oil lubrication test there is. Which means that this is an extremely good motorcycle engine oil that will keep your bike running efficiently and powerfully for the life of the engine.
This oil is good enough to stay in your bike for extended drain intervals. It just doesn't break down as fast as a conventional motor oil, and that makes it a bit more cost effective to use. There are several different viscosities of Red Line, but the 20W-50 is the most versatile and will work in virtually every bike made.
If you like the underdog here, then consider using Red Line 20W-50 Motorcycle Oil in your bike engine. It's the best motorcycle oil at this party, as long as AMSOIL doesn't show up.