fuel is now a bit less derpy. Napalm produces volatile fuel, and less of it. Fire consumes more welding fuel.

code/ZAS/Fire.dm

@@ -223,7 +223,7 @@ datum/gas_mixture/proc/zburn(obj/effect/decal/cleanable/liquid_fuel/liquid)
 				if(fuel.moles <= 0) del fuel
 
 			if(liquid)
-				liquid.amount -= liquid.amount*consumed_gas/(15*total_reactants)
+				liquid.amount -= liquid.amount*consumed_gas/(total_reactants)
 				if(liquid.amount <= 0) del liquid
 
 			update_values()

code/game/objects/effects/decals/Cleanable/fuel.dm

@@ -26,10 +26,11 @@ obj/effect/decal/cleanable/liquid_fuel
 		if(!istype(S)) return
 		for(var/d in cardinal)
 			if(rand(25))
-				var/turf/simulated/O = get_step(src,d)
-				if(O.CanPass(target = get_turf(src), air_group = 1))
-					if(!locate(/obj/effect/decal/cleanable/liquid_fuel) in O)
-						new/obj/effect/decal/cleanable/liquid_fuel(O,amount*0.25)
+				var/turf/simulated/target = get_step(src,d)
+				var/turf/simulated/origin = get_turf(src)
+				if(origin.CanPass(null, target, 0, 0) && target.CanPass(null, origin, 0, 0))
+					if(!locate(/obj/effect/decal/cleanable/liquid_fuel) in target)
+						new/obj/effect/decal/cleanable/liquid_fuel(target, amount*0.25)
 						amount *= 0.75
 
 	flamethrower_fuel
@@ -38,18 +39,19 @@ obj/effect/decal/cleanable/liquid_fuel
 		New(newLoc, amt = 1, d = 0)
 			dir = d //Setting this direction means you won't get torched by your own flamethrower.
 			. = ..()
+
 		Spread()
 			//The spread for flamethrower fuel is much more precise, to create a wide fire pattern.
 			if(amount < 0.1) return
 			var/turf/simulated/S = loc
 			if(!istype(S)) return
 
-			for(var/d in list(turn(dir,90),turn(dir,-90)))
+			for(var/d in list(turn(dir,90),turn(dir,-90), dir))
 				var/turf/simulated/O = get_step(S,d)
 				if(locate(/obj/effect/decal/cleanable/liquid_fuel/flamethrower_fuel) in O)
 					continue
-				if(O.CanPass(target = get_turf(src), air_group = 1))
+				if(O.CanPass(null, S, 0, 0) && S.CanPass(null, O, 0, 0))
 					new/obj/effect/decal/cleanable/liquid_fuel/flamethrower_fuel(O,amount*0.25,d)
 					O.hotspot_expose((T20C*2) + 380,500) //Light flamethrower fuel on fire immediately.
 
-			amount *= 0.5
+			amount *= 0.25

code/modules/reagents/Chemistry-Recipes.dm

@@ -386,7 +386,7 @@ datum
 
 					var/datum/gas_mixture/napalm = new
 
-					napalm.toxins = created_volume*10
+					napalm.volatile_fuel = created_volume
 					napalm.temperature = 400+T0C
 					napalm.update_values()