diff --git a/README.md b/README.md
index e06e1cb..3ecf540 100644
--- a/README.md
+++ b/README.md
@@ -118,7 +118,14 @@ Add a `HybridCar` class
 - Create a `HybridCar` class that extends `Car`.
 - It will need variables for both battery level and fuel level
 - Implement `Refuelable` and `Chargeable` together
-- (Optional) Override methods to manage both power sources (driving drains battery first, then gas)
+- Service logic for HybridCar:
+```
+needsService(): return true if mileage > 10000
+performService():
+Print "Engine oil changed and battery system checked"
+Reset fuelLevel to 100
+Reset chargeLevel to 100
+```
 
 ## Workflow
 1. Fork the repository to your own Git account