This will make your Oils last forever !

It changes the duration from 20/40/60 to 5000 for all types of oils.

V1.1 :
Size problem fixed
Now should work !

How to install

If you already have a mods overwriting the original patch.bundle :
You will need the quickbms application, if you don't have i recommend you to follow the modding tutorial for The Witcher 3 : http://www.nexusmods.com/witcher3/mods/14/?

So, you should have a folder called 'Mods' in the "The Witcher 3" folder, and the quickbms.exe in it.

• Download the version with installer
• Create a new folder in the quickbms folder and name it as you want
• The quickbms folder MUST be located on the folder "The Witcher 3"
• Extract the Everlasting Oils Installer _ 5000 hits _ quickbms REQUIRED.zip file in this new folder
• Launch OilInstaller.bat
• Enjoy
  

If you don't have other mods overwriting the patch.bundle file :

• Download the version without installer
• Go to \The Witcher 3\content\patch0\bundles and make a backup of the original patch.bundle file (by renaming it for exemple)
• Extract the Everlasting Oils _ 5000 hits _ patch.bundle.zip in \The Witcher 3\content\patch0\bundles overwriting the original file
• Enjoy
  

How to uninstall

quickbms version :

• lauch OilUninstaller.bat
  

patch.bundle version :

• overwrite the modded patch.bundle file with your backup
  

This is my very first mod, I hope this will work for you, as you can see with the screenshot, it works for me :)
I'll need feedback ! Tell me if it works or not.

Credits :
-Camreth for the original mod and the idea.
-Polymorpher for his modding tutorial.
-Sezurus for his install method.