Taking care of your machine

Hi all.
Eventually, after time and time (to not say years....) spent testing, and trying, and learning, boring all of you here, and so on, abut my homemade CNC, it seems I started to enjoy it!!!
Lot of way still to walk, but the first productions are coming, with my satisfaction: the machine appears enough reliable, with a good precision (if I measured in the right way, is about 0.01 mm, more than enough for my hobbies), good repeatability (the new motors and hybrid drivers work great!), and so on.

But now I wondering about the best way to take care of its mechanics.
Everytime, I use a vacuum to clean all the debris, but it's also time to take care about lead screws and rails.
I was thinking to use white petroleum to clean the screws and the rails (removing all the old grease), then replace it.
Some questions about:
1) the withe petroleum is a good choice?
2) to lubricate all, I have 3 possibilities: WD40 (a classic one), PTFE Grease and Nautical Li grease. Wich one could be the best choice? or alternatively, what to use?

Thanks

Andrea

Andrea, a picture or two of the parts you want to lubricate would be good.

I attached an image of my machine while under construction.
Highlighted,the items i'm talking about (well,the visible ones,obviously there are some other leadscrews and rails).
About the "white petroleum" (this is what is written on the can) Is the same product you told (i use it for my motorbike too).
So, as i understand, you're suggesting me to use such "liquid" lubricant,instead of such a....sticky grease.
Ok,i'll hava a look to find the one you suggest me.

Thanks

Andrra
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Yep, I've been thinking for such rail covers, I'd have to thinkering about.
The main thing puzzling me is the space available on Y front and rear. Y (the useful workspace) is about 700 mm; if on the rear side this gives me enough room (about 200 mm) to place such folded concertina-cover, on the front side it doesn't: when on Y0, the room between the front border and the base of X is about 20 mm. No way to...store the covers when the machine is close to Y0.

About the suggested lubricant (Mobil Vactra), I found it but we're talking about 20lt (5gal) and 180$.... For my hobbistic purposes it's really too much (quantity and money...)
But browsing the other lubricants, I found maybe something similar; I'm talking about lubricant for sewing machines, bike chains, generally speaking "moving parts".
Do you think it could be a good alternative?

Andrea

Way oil VG68

Do you have workshops close with machines, ask to buy a small amount.

Where are you located?