diff --git a/src/main/kotlin/ru/otus/cars/Car.kt b/src/main/kotlin/ru/otus/cars/Car.kt
index 559978c..fc7cfad 100644
--- a/src/main/kotlin/ru/otus/cars/Car.kt
+++ b/src/main/kotlin/ru/otus/cars/Car.kt
@@ -28,4 +28,9 @@ interface Car : CarInput {
      * Внутренний статический класс - номерой знак
      */
     data class Plates(val number: String, val region: Int)
+
+    /**
+     * Горловина бензобака
+     */
+    val tankMouth: TankMouth
 }
\ No newline at end of file
diff --git a/src/main/kotlin/ru/otus/cars/CarOutput.kt b/src/main/kotlin/ru/otus/cars/CarOutput.kt
index 875339f..a8178eb 100644
--- a/src/main/kotlin/ru/otus/cars/CarOutput.kt
+++ b/src/main/kotlin/ru/otus/cars/CarOutput.kt
@@ -8,4 +8,9 @@ interface CarOutput {
      * Скажи текущую скорость
      */
     fun getCurrentSpeed(): Int
+
+    /**
+     * Скажи сколько топлива
+     */
+    fun getFuelContents(): Int
 }
\ 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..d245bfc
--- /dev/null
+++ b/src/main/kotlin/ru/otus/cars/LpgMouth.kt
@@ -0,0 +1,14 @@
+package ru.otus.cars
+
+
+class LpgMouth(tank: Tank) : TankMouth(tank){
+    fun fuelLpg(liters : Int) {
+        if (MouthState == false) {
+            println("Закрыта горловина бака")
+            open()
+        }
+        println("Собираемся заправить $liters литров газа")
+        tank.receiveFuel(liters)
+        close()
+    }
+}
\ 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..1b429d0
--- /dev/null
+++ b/src/main/kotlin/ru/otus/cars/PetrolMouth.kt
@@ -0,0 +1,13 @@
+package ru.otus.cars
+
+class PetrolMouth(tank: Tank) : TankMouth(tank){
+    fun fuelPetrol(liters : Int){
+        if (MouthState==false) {
+            println("Закрыта горловина бака")
+            open()
+        }
+        println("Собираемся заправить $liters литров бензина")
+        tank.receiveFuel(liters)
+        close()
+    }
+}
\ No newline at end of file
diff --git a/src/main/kotlin/ru/otus/cars/Refill.kt b/src/main/kotlin/ru/otus/cars/Refill.kt
new file mode 100644
index 0000000..500c340
--- /dev/null
+++ b/src/main/kotlin/ru/otus/cars/Refill.kt
@@ -0,0 +1,15 @@
+package ru.otus.cars
+
+class Refill {
+    fun refuel(car: Car, count: Int)    {
+        try {
+            when (car.tankMouth) {
+                is LpgMouth -> (car.tankMouth as LpgMouth).fuelLpg(count)
+                is PetrolMouth -> (car.tankMouth as PetrolMouth).fuelPetrol(count)
+            }
+        }
+        catch (exception: NotImplementedError) {
+            println("Взрыв бака")
+        }
+    }
+}
\ 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..34c2d14
--- /dev/null
+++ b/src/main/kotlin/ru/otus/cars/Tank.kt
@@ -0,0 +1,29 @@
+package ru.otus.cars
+
+import kotlin.random.Random
+
+interface Tank  {
+    fun getContents():Int
+    fun receiveFuel(liters : Int)
+}
+
+
+open class CarTank (val capacity: Int): Tank {
+    private var content = Random.nextInt(0, capacity/2)
+
+    override fun getContents(): Int = content
+
+    override fun receiveFuel(liters: Int) {
+        if (content+liters == capacity) {
+            content += liters
+            println("Заправили до полного бака")
+        } else if (content+liters > capacity) {
+            content = capacity
+            println("Полный бак. Не влезло ${content+liters-capacity} литров")
+        }
+        else {
+            content += liters
+            println("Залили $liters литров")
+        }
+    }
+}
\ 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..ab34a0d
--- /dev/null
+++ b/src/main/kotlin/ru/otus/cars/TankMouth.kt
@@ -0,0 +1,16 @@
+package ru.otus.cars
+
+abstract class TankMouth(protected val tank: Tank) {
+
+    var MouthState: Boolean = false // Доступность горловины бензобака
+
+    fun open() {
+        println("Горловина открыта")
+        MouthState = true;
+    }
+
+    fun close() {
+        println("Горловина закрыта")
+        MouthState = false;
+    }
+}
diff --git a/src/main/kotlin/ru/otus/cars/Taz.kt b/src/main/kotlin/ru/otus/cars/Taz.kt
index 49df937..e32c0f4 100644
--- a/src/main/kotlin/ru/otus/cars/Taz.kt
+++ b/src/main/kotlin/ru/otus/cars/Taz.kt
@@ -36,4 +36,7 @@ object Taz: Car {
     override fun wheelToLeft(degrees: Int) {
         throw NotImplementedError("Руля нет")
     }
+
+    override val tankMouth: TankMouth
+       get() = throw NotImplementedError("Бензобака нет")
 }
\ No newline at end of file
diff --git a/src/main/kotlin/ru/otus/cars/Vaz2107.kt b/src/main/kotlin/ru/otus/cars/Vaz2107.kt
index be857d2..215ac80 100644
--- a/src/main/kotlin/ru/otus/cars/Vaz2107.kt
+++ b/src/main/kotlin/ru/otus/cars/Vaz2107.kt
@@ -20,6 +20,7 @@ class Vaz2107 private constructor(color: String) : VazPlatform(color) {
         override fun build(plates: Car.Plates): Vaz2107 = Vaz2107("Зеленый").apply {
             this.engine = getRandomEngine()
             this.plates = plates
+            this.tankMouth = LpgMouth(tank)
         }
 
         /**
@@ -59,7 +60,7 @@ 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, fuelContents=${tank.getContents()})"
     }
 
     /**
@@ -74,5 +75,11 @@ class Vaz2107 private constructor(color: String) : VazPlatform(color) {
         override fun getCurrentSpeed(): Int {
             return this@Vaz2107.currentSpeed
         }
+        override fun getFuelContents(): Int {
+            return this@Vaz2107.tank.getContents()
+        }
     }
-}
\ No newline at end of file
+
+    private val tank = CarTank(39)
+    override lateinit var tankMouth: TankMouth
+ }
\ 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..01b9e38 100644
--- a/src/main/kotlin/ru/otus/cars/Vaz2108.kt
+++ b/src/main/kotlin/ru/otus/cars/Vaz2108.kt
@@ -21,6 +21,7 @@ class Vaz2108 private constructor(color: String) : VazPlatform(color) {
         override fun build(plates: Car.Plates): Vaz2108 = Vaz2108("Красный").apply {
             this.engine = getRandomEngine()
             this.plates = plates
+            this.tankMouth = PetrolMouth(tank)
         }
 
         fun alignWheels(vaz2108: Vaz2108) {
@@ -63,7 +64,7 @@ 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, fuelContents=${tank.getContents()})"
     }
 
     /**
@@ -78,5 +79,11 @@ class Vaz2108 private constructor(color: String) : VazPlatform(color) {
         override fun getCurrentSpeed(): Int {
             return this@Vaz2108.currentSpeed
         }
+        override fun getFuelContents(): Int {
+            return this@Vaz2108.tank.getContents()
+        }
     }
+
+    private val tank = CarTank(43)
+    override lateinit var tankMouth: TankMouth
 }
\ 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..2f20a05 100644
--- a/src/main/kotlin/ru/otus/cars/main.kt
+++ b/src/main/kotlin/ru/otus/cars/main.kt
@@ -1,5 +1,7 @@
 package ru.otus.cars
 
+import kotlin.random.Random
+
 fun main() {
     println("\n===> drive cars...")
     driveCars()
@@ -16,6 +18,8 @@ fun main() {
     techChecks()
     println("\n===> Taz...")
     println(Taz.color)
+    println("\n===> refill...")
+    refill()
 }
 
 fun driveCars() {
@@ -90,4 +94,27 @@ 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 refill() {
+    val fueldStation = Refill()
+    val cars = listOf(
+        Vaz2107.build(Car.Plates("123", 77)),
+        Vaz2108.build(Car.Plates("321", 78))
+    )
+
+    cars.forEach { car ->
+        println("На заправке $car")
+        println("Сейчас в баке ${car.carOutput.getFuelContents()} литров")
+        val count = Random.nextInt(1, 30)
+        fueldStation.refuel(car,count)
+        println("Заправили $count литров")
+        try {
+            println("Итого в баке ${car.carOutput.getFuelContents()} литров")
+        }
+        catch (e: NotImplementedError)
+        {
+            println("Взрыв машины")
+        }
+    }
 }
\ No newline at end of file