I recommend you to fit your bike with a lubrication system like this one -Scottoiler vacuum system. I got the one from Louis.de at a low price like 50EUR.
With little research on Scottoiler.com site I found out where the vacuum line connects on the bike.
This is the way I mount it . I’ll give it a try and see if the level difference is enough. After I clean my chain of course
I added a short video to show you how the vacuum tube is fitted: