POOR MILEAGE Questions

I'm Getting 9miles To The Gallon

As Per My Information Center My Vehicle Is Only Getting 7.7 Mpg On The Highway And 5.5 Local. Any Way To Improve This Or Check It?

I Put Petrol In My Diesel Car By Mistake, So I Had It Drained And Some Diesel Put In. Started Okay But It Is Using A Ridiculous Amount Of...

The Fuel Mileage Has Dropped By Over Two Thirds All Of The Sudden. A Full Tank Is Good For 80 Miles. It's Not Having Any Other Problems And...

I Have Bad Fuel Consumption After Engine Overhaul.. Where To Start Diagnosing.. No Warning Lamps

My Car Consumes A Lot Of Fuel, How Can I Reduce The Consumption?

Went From 31 Hwy, To 18, City 22 To 15 I Replaced Plugs , Air Filter , And Master Aie Flow Sensor. Its Acting Like Its Missing But...