Are you using this oil in your car/truck, or in your bike?
If this is going into the gearcase/clutch of your bike then you will not be doing your bike any favors, that is for sure! Any claims of longer oil life would be based on a typical automotive engine use where the life of the oil is based on the standard contaminantes of combustion byproducts.
A dirt bike is a different situation completely. The oil that lubricates the clutch will very quickly be contaminated with particals of the clutch, which then become abrasive to the bearings and gears. The oil itself is fine, it is just dirty. There is no point in having expensive, dirty oil......
Rod