I own a Prius 2010 Model 1.8 S package.
We bought it on 53000 km in august 2013 and now it is 70000 km. The car in start was giving 23-24 KMPL while we were in Islamabad and now as we moved to DHA since November the car was giving 22-23 KMPL. But now the average has dropped to 18-19 KMPL on Normal Petrol and 21-22 KMPL on High Octane. The tyres which we installed are Dunlop SP Sport LM702 ( a very hard and bad tyre, i must say). Kindly let me know that does Prius requires any kind of tuning to increase the fuel average or it is a tyre issue, because we drive it with a light foot.
Till now We only did regular Oil Change from Toyota (20W-50) and got the CVT oil change from Toyota. Kindly recommend any other engine oil, if this inst the right one.
Looking forward for your replies