maybe the spartans needed time at thermopylae, no heroin no alchohol no nicotine, nor did they need help from caffeine-just dynomite and turpentine. maybe they needed oil for gas-explosive one like kerosine, with lots of Octane and free of lead, a fuel like BENZIN!!! (petrol in german and arabic)

that's why they made the Pilos (the bullet shaped helmet) -to cut on gasoline needed for transportation and shooting

(no that's not true-pilos was open and lighter than a corinthian-so the opted for it since 450BC)