Oils are now less boring and designed to help Geralt kill their intended targets


Examples: Yrden makes fighting wolves much easier, so Beast Oil buffs yrden.
Necrophages are usually weak to fire so Necrophage Oil buffs Igni.


Changes:

Geralt can apply all oils to either weapon
All oils have 50 uses, regardless of level

Beast
+yrden intensity      10 / 15 / 20
+bleed chance          20 / 30 / 40
+damage vs beasts  10 / 15 / 20

Cursed
+igni intensity          10 / 15 / 20
+burn chance            10 / 15 / 20
+damage vs cursed   10 / 15 / 20

Human
+chance to stagger     10 / 20 / 30
+axii intensity            10 / 20 / 30
+damage vs humans   10 / 15 / 20

Hybrid
+aard intensity           10 / 20 / 30
+quen intensity           10 / 15 / 20
+damage vs hybrids    10 / 15 / 20

Insect
+chance to poison     10 / 20 / 30
+armor piercing        10 / 15 / 20
+damage vs insects   10 / 15 / 20

Elementals
+attack power                 05 / 10 / 15
+armor piercing              10 / 15 / 20
+damage vs elementals   10 / 15 / 20

Necrophage
+chance to confuse            10 / 20 / 30
+igni intensity                   10 / 15 / 20
+damage vs necrophages   10 / 15 / 20

Specter
+chance to instantly kill       1 /  2  /  3 
+yrden intensity                 10 / 20 / 30
+damage vs specters         10 / 15 / 20

Vampire
+chance to bleed          10 / 20 / 30
+axii intensity              10 / 15 / 20
+damage vs vampires   10 / 15 / 20

Dragon
+attack power            10 / 15 / 20
+aard intensity           10 / 20 / 30
+damage vs dragons   10 / 15 / 20

Ogre
+yrden intensity       5 / 10 / 15
+quen intensity       10 / 20 / 30
+damage vs ogres   10 / 15 / 20

Relict
+sign intensity           10 / 15 / 20
+igni intensity           10 / 20 / 30
+damage vs relicts    10 / 15 / 20


- Feedback -
Feedback is always appreciated, if anything's balanced badly or doesn't fit thematically let me know and I'll fix it in the next update



Also check out
Primer
Witcher 3 Enhanced Edition