Dear all!
I have purchased honda city 2007 but it has problem that it is reducing engine oil ,first time i used honda synthetic oil but after i realised that car is reducing engine oil than i switch to Havoline 20W 50 ,now reduction in oil is relatively less but engine sound has been chaged.

I have to drive about 250kms daily which includes hilly area as wel and car gives around 13~14km/lit average.
What do you suggest what oil should i use for my honda city.