A year ago I purchased my Honda Civic SI 2015, all this time I've been experiencing a bad fuel consumption.
I'm only getting between 400km (248 miles) to 440km (273 miles) per full tank (50 liters) that means 8,5 km per liter.
I changed the sparks plugs because I thought that was the problem but it didn't change anything.
Also when the engine is running but I'm stopped in a red light or just parked with the engine running it use so much fuel because I can see the the fuel indicator goes down quickly.
If you know what is happening with my car please let me know
thank you guys in advance!