The 4UAD 4UANTUM "High Speed" oil is a new lubricant made by 4UAD Taiwan. It comes in a handy pen format that allows exact dosing and easier application in hard to reach areas.
This paraffin based oil is free of silicone and is therefor safe to use with GBB's or VSR's utilizing silicone based bockings (Flamingo, Modify X-range, etc).
I made a video showing how this can go wrong here: https://youtu.be/2_KtwtvDoKE
So the 4UAD "High Speed" oil is a general purpose oil that can be used for just about anything, and will avoid damaging any silicone based hop-up buckings as well.
It's especially good for "lightweight" parts; small parts that fast or have large contact surfaces. In those cases, a thin lubricant like this one can be a better choice over thicker lubricants, that might slow down the parts instead. Examples of this are some pistol slides, small light springs and outside surfaces of GBB nozzles.
