Hello,I really like your mod,cool things!
Maybe you know if is possible I put my custom oil(I have a mod)to be used like "ammo" in vanilla Flametrower?and if possible,you know how?
sorry for my bad english

hmm.. You want add your oil in Flametrower??

You can search file fire.lua
Factorio\data\base\prototypes\entity\fire

turret entity = line 852 ~ 1177

oil = line 1119

fluids = {
{type = "crude-oil"},
{type = "heavy-oil", damage_modifier = 1.05},
{type = "light-oil", damage_modifier = 1.1}
},

and add and control script your oil in this sector

or want [fluid] -> [bullet]
You can refer to flame-thrower-ammo in ammo.lua at line 55 ~ 61

action_delivery =
{
type = "stream",
stream = "handheld-flamethrower-fire-stream",
max_length = 15,
duration = 160,
}