From Emil Chronicle Wiki

Tanker is a level 18 monster.

[edit] Stats

Basic	Combat
Level 18 Experience 47 Job Experience 33 HP 111 SP 37 MP 23 Behavior Passive	Type Animal A.SPD 2.84 ATK 26 - 31 DEF 12 - 18 C.SPD 2.00 M.ATK 21 - 29 M.DEF 11 - 51
Properties Fire(10%) Item Drops Crude Oil, Plastic, Bottled Oil, Machine Oil, Tanker Stamp Skills  ??? Location Battleship Island