Please check the oil level.

I have installed a PD in my T3 bus.
I have now driven it for almost 20,000 km and am very satisfied.
I would like to resolve one annoying issue.
Due to the angle of the engine, the yellow oil can with the message "Please check oil level" appears every 100 km, along with a warning light.
The oil level is sufficient, and I don't want to overfill it.
Now I don't want to shut down the whole system, so my question to the species:
My question concerns the value "100".
Can I change this value, for example to 500 or 800?
Best regards, Hoin