They MIGHT help, but there are so many out there that don’t, or, worse yet, that can actually CAUSE engine troubles, I just don’t see the need to risk it. Use a good quality oil and high efficiency filtration, and you’ll do very well.

That being said, it’s not my vehicle, so, if you want to try it, you’re certainly entitled to. Maybe Zmax is a great product. I just don’t know for certain.

That’s just not what this site is about. It’s about helping users become better informed so that they can make these sorts of decisions themselves, in an educated manner.

It looks as if this bike calls for a 10w40 viscosity. There’s likely no reason to deviate from this unless you’re getting alot of oil blowing past the rings, in which case you might want to move to a heavier weight oil.

Otherwise, I’d use the “View the Specs” option in the right-hand column of this site to look up the specs for all the 10w40 oils in the database and find those with the best specs (generally, for motorcycle applications, high temp specs are more critical than low temp ones).

Then, compare prices for the “top oils” and see what fits your budget best.

Also, if your engine does have 100,000 km (about 60K miles), and it’s been running petroleum oil the whole time, I could see the possibility of moving to a heavier weight oil such as the 10w40 vs a 10w30, although it may not be necessary.

If you’re not consuming much oil, then there is likely no reason to “bump up”. 10w30 would likely still be fine. But, if you ARE consuming considerable amounts of oil, then moving up to a 10w40 might be of use.

As for the other lubes, without knowing what your owners manual originally called for, it would be very difficult to make any recommendations regarding those lubes.