diff --git a/src/main/kotlin/ru/otus/cars/Car.kt b/src/main/kotlin/ru/otus/cars/Car.kt
index 559978c..f26e244 100644
--- a/src/main/kotlin/ru/otus/cars/Car.kt
+++ b/src/main/kotlin/ru/otus/cars/Car.kt
@@ -18,6 +18,7 @@ interface Car : CarInput {
      * Следит за машиной
      */
     val carOutput: CarOutput
+    val tankMouth: TankMouth
 
     /**
      * Получить оборудование
diff --git a/src/main/kotlin/ru/otus/cars/CarOutput.kt b/src/main/kotlin/ru/otus/cars/CarOutput.kt
index 875339f..f4bbfbe 100644
--- a/src/main/kotlin/ru/otus/cars/CarOutput.kt
+++ b/src/main/kotlin/ru/otus/cars/CarOutput.kt
@@ -8,4 +8,5 @@ interface CarOutput {
      * Скажи текущую скорость
      */
     fun getCurrentSpeed(): Int
+    fun getFuelLevel(): Int
 }
\ No newline at end of file
diff --git a/src/main/kotlin/ru/otus/cars/DefaultTank.kt b/src/main/kotlin/ru/otus/cars/DefaultTank.kt
new file mode 100644
index 0000000..5089c4b
--- /dev/null
+++ b/src/main/kotlin/ru/otus/cars/DefaultTank.kt
@@ -0,0 +1,11 @@
+package ru.otus.cars
+
+class DefaultTank: Tank {
+    private var fuelLevel: Int = 0
+
+    override fun getContents(): Int = fuelLevel
+
+    override fun receiveFuel(liters: Int) {
+        fuelLevel += liters
+    }
+}
\ No newline at end of file
diff --git a/src/main/kotlin/ru/otus/cars/GasStation.kt b/src/main/kotlin/ru/otus/cars/GasStation.kt
new file mode 100644
index 0000000..7631915
--- /dev/null
+++ b/src/main/kotlin/ru/otus/cars/GasStation.kt
@@ -0,0 +1,21 @@
+package ru.otus.cars
+
+class GasStation {
+    fun addFuel(car: Car, fuel: Int) {
+        try {
+            if (car.tankMouth is LpgMouth) {
+                (car.tankMouth as LpgMouth).fuelLpg(fuel)
+            } else {
+                (car.tankMouth as PetrolMouth).fuelPetrol(fuel)
+            }
+        } catch (e: NotImplementedError) {
+            println(e.message)
+        }
+    }
+
+    fun addFuel(cars: List<Car>) {
+        cars.forEach { println(it.toString()) }
+        cars.forEach { this.addFuel(it, 100) }
+        cars.forEach { println(it.toString()) }
+    }
+}
\ No newline at end of file
diff --git a/src/main/kotlin/ru/otus/cars/LpgMouth.kt b/src/main/kotlin/ru/otus/cars/LpgMouth.kt
new file mode 100644
index 0000000..011fb4b
--- /dev/null
+++ b/src/main/kotlin/ru/otus/cars/LpgMouth.kt
@@ -0,0 +1,15 @@
+package ru.otus.cars
+
+class LpgMouth(override val tank: Tank): TankMouth() {
+    fun fuelLpg(litres: Int) {
+        tank.receiveFuel(litres)
+    }
+
+    override fun open() {
+        TODO("Not yet implemented")
+    }
+
+    override fun close() {
+        TODO("Not yet implemented")
+    }
+}
diff --git a/src/main/kotlin/ru/otus/cars/PetrolMouth.kt b/src/main/kotlin/ru/otus/cars/PetrolMouth.kt
new file mode 100644
index 0000000..7f1f8fc
--- /dev/null
+++ b/src/main/kotlin/ru/otus/cars/PetrolMouth.kt
@@ -0,0 +1,15 @@
+package ru.otus.cars
+
+class PetrolMouth(override val tank: Tank): TankMouth() {
+    fun fuelPetrol(litres: Int) {
+        tank.receiveFuel(litres)
+    }
+
+    override fun open() {
+        TODO("Not yet implemented")
+    }
+
+    override fun close() {
+        TODO("Not yet implemented")
+    }
+}
\ No newline at end of file
diff --git a/src/main/kotlin/ru/otus/cars/Tank.kt b/src/main/kotlin/ru/otus/cars/Tank.kt
new file mode 100644
index 0000000..2076079
--- /dev/null
+++ b/src/main/kotlin/ru/otus/cars/Tank.kt
@@ -0,0 +1,6 @@
+package ru.otus.cars
+
+interface Tank {
+    fun getContents(): Int
+    fun receiveFuel(liters: Int)
+}
\ No newline at end of file
diff --git a/src/main/kotlin/ru/otus/cars/TankMouth.kt b/src/main/kotlin/ru/otus/cars/TankMouth.kt
new file mode 100644
index 0000000..2d4f8d5
--- /dev/null
+++ b/src/main/kotlin/ru/otus/cars/TankMouth.kt
@@ -0,0 +1,8 @@
+package ru.otus.cars
+
+abstract class TankMouth {
+    abstract val tank: Tank
+
+    abstract fun open()
+    abstract fun close()
+}
\ No newline at end of file
diff --git a/src/main/kotlin/ru/otus/cars/Taz.kt b/src/main/kotlin/ru/otus/cars/Taz.kt
index 49df937..69157ee 100644
--- a/src/main/kotlin/ru/otus/cars/Taz.kt
+++ b/src/main/kotlin/ru/otus/cars/Taz.kt
@@ -18,6 +18,9 @@ object Taz: Car {
     override val carOutput: CarOutput
         get() = throw NotImplementedError("Приборов нет")
 
+    override val tankMouth: TankMouth
+        get() = throw NotImplementedError("Взрыв")
+
     /**
      * Получить оборудование
      */
diff --git a/src/main/kotlin/ru/otus/cars/Vaz2107.kt b/src/main/kotlin/ru/otus/cars/Vaz2107.kt
index be857d2..cc638bf 100644
--- a/src/main/kotlin/ru/otus/cars/Vaz2107.kt
+++ b/src/main/kotlin/ru/otus/cars/Vaz2107.kt
@@ -5,7 +5,7 @@ import kotlin.random.Random
 /**
  * Семёрочка
  */
-class Vaz2107 private constructor(color: String) : VazPlatform(color) {
+class Vaz2107 private constructor(color: String, override val tankMouth: TankMouth) : VazPlatform(color) {
     /**
      * Сам-себе-сборщик ВАЗ 2107.
      */
@@ -17,7 +17,7 @@ class Vaz2107 private constructor(color: String) : VazPlatform(color) {
             }
         }
 
-        override fun build(plates: Car.Plates): Vaz2107 = Vaz2107("Зеленый").apply {
+        override fun build(plates: Car.Plates): Vaz2107 = Vaz2107("Зеленый", PetrolMouth(DefaultTank())).apply {
             this.engine = getRandomEngine()
             this.plates = plates
         }
@@ -49,8 +49,7 @@ class Vaz2107 private constructor(color: String) : VazPlatform(color) {
     }
 
     private var currentSpeed: Int = 0 // Скока жмёт
-
-    /**
+            /**
      * Доступно сборщику
      * @see [build]
      */
@@ -59,7 +58,7 @@ class Vaz2107 private constructor(color: String) : VazPlatform(color) {
 
     // Выводим состояние машины
     override fun toString(): String {
-        return "Vaz2107(plates=$plates, wheelAngle=$wheelAngle, currentSpeed=$currentSpeed)"
+        return "Vaz2107(plates=$plates, wheelAngle=$wheelAngle, currentSpeed=$currentSpeed, fuelLevel=${carOutput.getFuelLevel()})"
     }
 
     /**
@@ -74,5 +73,9 @@ class Vaz2107 private constructor(color: String) : VazPlatform(color) {
         override fun getCurrentSpeed(): Int {
             return this@Vaz2107.currentSpeed
         }
+
+        override fun getFuelLevel(): Int {
+            return  this@Vaz2107.tankMouth.tank.getContents()
+        }
     }
 }
\ No newline at end of file
diff --git a/src/main/kotlin/ru/otus/cars/Vaz2108.kt b/src/main/kotlin/ru/otus/cars/Vaz2108.kt
index 27b83b8..30e8e25 100644
--- a/src/main/kotlin/ru/otus/cars/Vaz2108.kt
+++ b/src/main/kotlin/ru/otus/cars/Vaz2108.kt
@@ -5,7 +5,7 @@ import kotlin.random.Random
 /**
  * Восьмерка
  */
-class Vaz2108 private constructor(color: String) : VazPlatform(color) {
+class Vaz2108 private constructor(color: String, override val tankMouth: TankMouth) : VazPlatform(color) {
     /**
      * Сам-себе-сборщик ВАЗ 2108.
      */
@@ -18,7 +18,7 @@ class Vaz2108 private constructor(color: String) : VazPlatform(color) {
             }
         }
 
-        override fun build(plates: Car.Plates): Vaz2108 = Vaz2108("Красный").apply {
+        override fun build(plates: Car.Plates): Vaz2108 = Vaz2108("Красный", LpgMouth(DefaultTank())).apply {
             this.engine = getRandomEngine()
             this.plates = plates
         }
@@ -63,14 +63,13 @@ class Vaz2108 private constructor(color: String) : VazPlatform(color) {
 
     // Выводим состояние машины
     override fun toString(): String {
-        return "Vaz2108(plates=$plates, wheelAngle=$wheelAngle, currentSpeed=$currentSpeed)"
+        return "Vaz2108(plates=$plates, wheelAngle=$wheelAngle, currentSpeed=$currentSpeed, fuelLevel=${carOutput.getFuelLevel()})"
     }
 
     /**
      * Делегируем приборы внутреннему классу
      */
     override val carOutput: CarOutput = VazOutput()
-
     /**
      * Имеет доступ к внутренним данным ЭТОГО ВАЗ-2108!
      */
@@ -78,5 +77,9 @@ class Vaz2108 private constructor(color: String) : VazPlatform(color) {
         override fun getCurrentSpeed(): Int {
             return this@Vaz2108.currentSpeed
         }
+
+        override fun getFuelLevel(): Int {
+            return  this@Vaz2108.tankMouth.tank.getContents()
+        }
     }
 }
\ No newline at end of file
diff --git a/src/main/kotlin/ru/otus/cars/main.kt b/src/main/kotlin/ru/otus/cars/main.kt
index 978d0ef..d07ee3d 100644
--- a/src/main/kotlin/ru/otus/cars/main.kt
+++ b/src/main/kotlin/ru/otus/cars/main.kt
@@ -1,6 +1,8 @@
 package ru.otus.cars
 
 fun main() {
+    println("\n===> fuel cars")
+    fuelCars()
     println("\n===> drive cars...")
     driveCars()
     println("\n===> inner test...")
@@ -90,4 +92,15 @@ fun repairEngine(car: VazPlatform) {
         is VazEngine.LADA_2107 -> println("Чистка карбюратора у двигателя объемом ${car.engine.volume} куб.см у машины $car")
         is VazEngine.SAMARA_2108 -> println("Угол зажигания у двигателя объемом ${car.engine.volume} куб.см у машины $car")
     }
+}
+
+fun fuelCars() {
+    val cars = listOf(
+        Togliatti.buildCar(Vaz2107, Car.Plates("123", 11)),
+        Togliatti.buildCar(Vaz2108, Car.Plates("123", 22)),
+        Taz
+    )
+
+    val tankStation = GasStation()
+    tankStation.addFuel(cars)
 }
\ No newline at end of file