Just my opinion only. I pay a shit load of money to buy my bikes and I work bloody hard to earn that money. So when it comes to putting oil in my bike I am more than happy to spend a few extra dollars for the right recommended motorcycle oils to go into my motor, transmisson and primary to me it's cheap insurance. Anyway as I said my opinion only.
Some V-twin motorcycles, like modern Indian* and Victory* bikes, use a shared sump, meaning they use the same lubricant in the engine, transmission and primary chaincase. Most Harley-Davidson* motorcycles, however, use a separate sump for each lubricant. This presents Harley owners with a choice: Use the same lubricant in all three areas of the bike, or use a separate lubricant formulated and labeled for each area. Here, we offer guidance for deciding what’s right for you.
I use the same oil as my diesel truck for my motorcycle. All 3 holes too.!!! Same oil goes into the mowers. A John Deere and honda.!
Viscosity is the resistance to flow of a fluid. Motor oil viscosity grades are based on a scale developed by the API (American Petroleum Institute) lubricant organization. The values are defined in a specification known as API 1509 and are based on the resistance the oil gives to flowing at two different temperatures – cold and high temperature. The measurement of viscosity at high and low temperatures are properties of multi-grade oils. Years ago, most vehicles used one viscosity grade oil in the summer and a different viscosity grade oil in the winter. But as motor oil technology advanced, additives such as viscosity index improvers allowed for the use of the same grade of oil year-round.
