diff --git a/README.md b/README.md
index 466cb7f..9725259 100644
--- a/README.md
+++ b/README.md
@@ -57,4 +57,3 @@
 - статические внутренние класс и объекты (например, для бачка внутри машины)
 - объекты-компаньоны (для сборщика бака и горловины)
 - Sealed-интерфейсы или классы (горловина бачка)
-
diff --git a/src/main/kotlin/ru/otus/cars/Car.kt b/src/main/kotlin/ru/otus/cars/Car.kt
index 559978c..77aa4b3 100644
--- a/src/main/kotlin/ru/otus/cars/Car.kt
+++ b/src/main/kotlin/ru/otus/cars/Car.kt
@@ -28,4 +28,8 @@ interface Car : CarInput {
      * Внутренний статический класс - номерой знак
      */
     data class Plates(val number: String, val region: Int)
+
+    val tank: Tank
+    val tankMouth: TankMouth
+    fun fuelLevel(): Int = tank.fuelLevel
 }
\ No newline at end of file
diff --git a/src/main/kotlin/ru/otus/cars/CarFactory.kt b/src/main/kotlin/ru/otus/cars/CarFactory.kt
index 3b8f03e..2185065 100644
--- a/src/main/kotlin/ru/otus/cars/CarFactory.kt
+++ b/src/main/kotlin/ru/otus/cars/CarFactory.kt
@@ -17,6 +17,11 @@ object Togliatti : CarFactory {
     private fun buildVaz2107(plates: Car.Plates): Car {
         println("Запил ${Vaz2107.MODEL} в Тольятти...")
         val vaz = Vaz2107.build(plates)
+
+        val tank = TankImpl(capacity = 50)
+        val mouth = GasMouth
+        vaz.installTank(tank, mouth)
+
         println("Проверяем тачку...")
         Vaz2107.test(vaz)
         vaz.drdrdrdrdr()
@@ -26,6 +31,11 @@ object Togliatti : CarFactory {
     private fun buildVaz2108(plates: Car.Plates): Car {
         println("Запил ${Vaz2108.MODEL} в Тольятти...")
         val vaz = Vaz2108.build(plates)
+
+        val tank = TankImpl(capacity = 55)
+        val mouth = PetrolMouth
+        vaz.installTank(tank, mouth)
+
         println("Сход-развал...")
         Vaz2108.alignWheels(vaz)
         vaz.zhzhzhzh()
diff --git a/src/main/kotlin/ru/otus/cars/CarOutput.kt b/src/main/kotlin/ru/otus/cars/CarOutput.kt
index 875339f..77a68f9 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 fuelLevel(): Int
 }
\ 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..a41fdc9
--- /dev/null
+++ b/src/main/kotlin/ru/otus/cars/GasStation.kt
@@ -0,0 +1,21 @@
+package ru.otus.cars
+
+import java.lang.Exception
+
+class GasStation {
+    fun refuel(car: Car, amount: Int) {
+        println("Заправляем машину ${car.color} на $amount литров...")
+        try {
+            car.tankMouth.refuel(car.tank, amount)
+        } catch (e: Exception) {
+            println("Бак у ${car.color} взорвался! Вызывайте пожарных! ${e.message}")
+        }
+
+    }
+
+    fun refuelCars(cars: List<Car>, amount: Int) {
+        cars.forEach { refuel(it, amount) }
+    }
+}
+
+
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..8695e73
--- /dev/null
+++ b/src/main/kotlin/ru/otus/cars/Tank.kt
@@ -0,0 +1,31 @@
+package ru.otus.cars
+
+interface Tank {
+    val capacity: Int
+    val fuelLevel: Int
+    fun isLow(): Boolean
+    fun addFuel(amount: Int)
+
+}
+
+class TankImpl(override val capacity: Int) : Tank {
+    override var fuelLevel: Int = 0
+        private set
+
+    override fun isLow(): Boolean = fuelLevel < capacity * 0.1
+
+    override fun addFuel(amount: Int) {
+        fuelLevel = (fuelLevel + amount).coerceAtMost(capacity)
+    }
+}
+
+class ExplosiveTank(override val capacity: Int) : Tank {
+    override var fuelLevel: Int = 0
+        private set
+
+    override fun isLow(): Boolean = false
+
+    override fun addFuel(amount: Int) {
+        throw IllegalStateException("Ба-бах! Бак взорвался>")
+    }
+}
\ 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..727575e
--- /dev/null
+++ b/src/main/kotlin/ru/otus/cars/TankMouth.kt
@@ -0,0 +1,25 @@
+package ru.otus.cars
+
+sealed interface TankMouth {
+    fun refuel(tank: Tank, amount: Int)
+}
+
+object GasMouth : TankMouth {
+    override fun refuel(tank: Tank, amount: Int) {
+        if (tank is ExplosiveTank) {
+            throw IllegalStateException("Ба-бах! Бак взорвался>")
+        }
+        println("Заливаем газ")
+        tank.addFuel(amount)
+    }
+}
+
+object PetrolMouth : TankMouth {
+    override fun refuel(tank: Tank, amount: Int) {
+        if (tank is ExplosiveTank) {
+            throw IllegalStateException("Ба-бах! Бак взорвался>")
+        }
+        println("Заливаем бензин")
+        tank.addFuel(amount)
+    }
+}
\ 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..126c9c2 100644
--- a/src/main/kotlin/ru/otus/cars/Taz.kt
+++ b/src/main/kotlin/ru/otus/cars/Taz.kt
@@ -1,6 +1,5 @@
 package ru.otus.cars
-
-object Taz: Car {
+object Taz : Car {
     /**
      * Номерной знак
      */
@@ -36,4 +35,15 @@ object Taz: Car {
     override fun wheelToLeft(degrees: Int) {
         throw NotImplementedError("Руля нет")
     }
+
+    override val tank: Tank = ExplosiveTank(40)
+    override var tankMouth: TankMouth = PetrolMouth
+
+    override fun fuelLevel(): Int {
+        return tank.fuelLevel
+    }
+
+    override fun toString(): String {
+        return "Taz(color=$color, fuel=${fuelLevel()})"
+    }
 }
\ 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..bfed1c1 100644
--- a/src/main/kotlin/ru/otus/cars/Vaz2107.kt
+++ b/src/main/kotlin/ru/otus/cars/Vaz2107.kt
@@ -74,5 +74,17 @@ class Vaz2107 private constructor(color: String) : VazPlatform(color) {
         override fun getCurrentSpeed(): Int {
             return this@Vaz2107.currentSpeed
         }
+
+        override fun fuelLevel(): Int {
+            return tank.fuelLevel
+        }
+    }
+
+    override lateinit var tank: Tank
+    override lateinit var tankMouth: TankMouth
+
+    fun installTank(tank: Tank, tankMouth: TankMouth) {
+        this.tank = tank
+        this.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..90375f6 100644
--- a/src/main/kotlin/ru/otus/cars/Vaz2108.kt
+++ b/src/main/kotlin/ru/otus/cars/Vaz2108.kt
@@ -78,5 +78,17 @@ class Vaz2108 private constructor(color: String) : VazPlatform(color) {
         override fun getCurrentSpeed(): Int {
             return this@Vaz2108.currentSpeed
         }
+
+        override fun fuelLevel(): Int {
+            return tank.fuelLevel
+        }
+    }
+
+    override lateinit var tank: Tank
+    override lateinit var tankMouth: TankMouth
+
+    fun installTank(tank: Tank, tankMouth: TankMouth) {
+        this.tank = tank
+        this.tankMouth = tankMouth
     }
 }
\ No newline at end of file
diff --git a/src/main/kotlin/ru/otus/cars/VazPlatform.kt b/src/main/kotlin/ru/otus/cars/VazPlatform.kt
index 079c2da..2bab564 100644
--- a/src/main/kotlin/ru/otus/cars/VazPlatform.kt
+++ b/src/main/kotlin/ru/otus/cars/VazPlatform.kt
@@ -5,9 +5,14 @@ abstract class VazPlatform(override val color: String) : Car {
     protected var wheelAngle: Int = 0 // Положение руля
 
     // Реализация интерфейса CarInput
-    override fun wheelToRight(degrees: Int) { wheelAngle += degrees }
+    override fun wheelToRight(degrees: Int) {
+        wheelAngle += degrees
+    }
+
     // Реализация интерфейса CarInput
-    override fun wheelToLeft(degrees: Int) { wheelAngle -= degrees }
+    override fun wheelToLeft(degrees: Int) {
+        wheelAngle -= degrees
+    }
 
     // Получить оборудование
     override fun getEquipment(): String = "Кузов, колеса, движок"
diff --git a/src/main/kotlin/ru/otus/cars/main.kt b/src/main/kotlin/ru/otus/cars/main.kt
index 978d0ef..ddb24c8 100644
--- a/src/main/kotlin/ru/otus/cars/main.kt
+++ b/src/main/kotlin/ru/otus/cars/main.kt
@@ -16,6 +16,8 @@ fun main() {
     techChecks()
     println("\n===> Taz...")
     println(Taz.color)
+    println("\n===> refuel cars...")
+    refuelCars()
 }
 
 fun driveCars() {
@@ -54,8 +56,7 @@ fun garageMake() {
 
 fun getEquipment() {
     val cars = listOf(
-        Vaz2107.build(Car.Plates("123", 77)),
-        Vaz2108.build(Car.Plates("321", 78))
+        Vaz2107.build(Car.Plates("123", 77)), Vaz2108.build(Car.Plates("321", 78))
     )
 
     cars.forEach { car ->
@@ -65,8 +66,7 @@ fun getEquipment() {
 
 fun getColor() {
     val cars = listOf(
-        Vaz2107.build(Car.Plates("123", 77)),
-        Vaz2108.build(Car.Plates("321", 78))
+        Vaz2107.build(Car.Plates("123", 77)), Vaz2108.build(Car.Plates("321", 78))
     )
 
     cars.forEach { car ->
@@ -90,4 +90,14 @@ 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 refuelCars() {
+    val cars = listOf(
+        Togliatti.buildCar(Vaz2107, Car.Plates("123", 77)),
+        Togliatti.buildCar(Vaz2108, Car.Plates("321", 78)),
+        Taz
+    )
+    val station = GasStation()
+    station.refuelCars(cars, amount = 30)
 }
\ No newline at end of file