diff --git a/src/main/kotlin/ru/otus/cars/Car.kt b/src/main/kotlin/ru/otus/cars/Car.kt
index 559978c..64e98cc 100644
--- a/src/main/kotlin/ru/otus/cars/Car.kt
+++ b/src/main/kotlin/ru/otus/cars/Car.kt
@@ -19,6 +19,11 @@ interface Car : CarInput {
      */
     val carOutput: CarOutput
 
+    /**
+     * Горловина бака
+     */
+    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..b92f439 100644
--- a/src/main/kotlin/ru/otus/cars/CarOutput.kt
+++ b/src/main/kotlin/ru/otus/cars/CarOutput.kt
@@ -8,4 +8,6 @@ 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..b445e91
--- /dev/null
+++ b/src/main/kotlin/ru/otus/cars/DefaultTank.kt
@@ -0,0 +1,12 @@
+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..d46b2c4
--- /dev/null
+++ b/src/main/kotlin/ru/otus/cars/GasStation.kt
@@ -0,0 +1,21 @@
+package ru.otus.cars
+
+class GasStation{
+    fun addFuelToCar(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 addFuelToCar(cars: List<Car>) {
+        cars.forEach { println(it.toString()) }
+        cars.forEach { this.addFuelToCar(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..0be2409
--- /dev/null
+++ b/src/main/kotlin/ru/otus/cars/LpgMouth.kt
@@ -0,0 +1,17 @@
+package ru.otus.cars
+
+class LpgMouth(override val tank: Tank): TankMouth() {
+    fun fuelLpg(liters: Int){
+        open()
+        tank.receiveFuel(liters)
+        close()
+    }
+
+    override fun close() {
+        println("Бак закрыт")
+    }
+
+    override fun open() {
+        println("Бак открыт")
+    }
+}
\ No newline at end of file
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..7aaa4ca
--- /dev/null
+++ b/src/main/kotlin/ru/otus/cars/PetrolMouth.kt
@@ -0,0 +1,17 @@
+package ru.otus.cars
+
+class PetrolMouth(override val tank: Tank): TankMouth() {
+    fun fuelPetrol(liters: Int){
+        open()
+        tank.receiveFuel(liters)
+        close()
+    }
+
+    override fun close() {
+        println("Бак закрыт")
+    }
+
+    override fun open() {
+        println("Бак открыт")
+    }
+}
\ 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..0fd2660
--- /dev/null
+++ b/src/main/kotlin/ru/otus/cars/TankMouth.kt
@@ -0,0 +1,10 @@
+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..4cb13eb 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("Бум")
+
     /**
      * Получить оборудование
      */
diff --git a/src/main/kotlin/ru/otus/cars/Vaz2107.kt b/src/main/kotlin/ru/otus/cars/Vaz2107.kt
index be857d2..eaf6313 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
         }
@@ -59,7 +59,7 @@ 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 +74,9 @@ 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..00eeb8f 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
         }
@@ -63,7 +63,7 @@ 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()}"
     }
 
     /**
@@ -78,5 +78,9 @@ 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..2a1c4f7 100644
--- a/src/main/kotlin/ru/otus/cars/main.kt
+++ b/src/main/kotlin/ru/otus/cars/main.kt
@@ -16,12 +16,13 @@ fun main() {
     techChecks()
     println("\n===> Taz...")
     println(Taz.color)
+
 }
 
 fun driveCars() {
     val vaz1 = Togliatti.buildCar(Vaz2107, Car.Plates("123", 77))
     val vaz2 = Togliatti.buildCar(Vaz2108, Car.Plates("321", 78))
-
+    fuelCars(listOf(vaz1,vaz2, Taz))  // Заправляем машины
     println("Экземпляры класса имеют разное внутреннее состояние:")
     vaz1.wheelToRight(10)
     println(vaz1.toString()) // Выводит 10 и случайную скорость
@@ -77,7 +78,6 @@ fun getColor() {
 fun techChecks() {
     val vaz1 = Vaz2107.build(Car.Plates("123", 77))
     val vaz2 = Vaz2108.build(Car.Plates("321", 78))
-
     repairEngine(vaz1)
     repairEngine(vaz2)
 }
@@ -90,4 +90,10 @@ 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(cars:List<Car>) {
+    println("\n===> fuel cars...")
+    val tankStation = GasStation()
+    tankStation.addFuelToCar(cars)
 }
\ No newline at end of file