HYUNDAI SONATA ENGINE POOR MILEAGE

What Would Cause A Hyundai Sonata To Make Gas Mileage Drop To 1/2? I Keep Oil Clean, Tire Pres Correct, New Air Filter, & Plugs. This Is...

It Rough Idles From 1k To Like 400 And It Has Accelerating Issue. When I Press The Gas Revs Go Up But Not The Speed. There Is Just A Random...

Hello, I Have A Quick Question, So After I Got My Oil Changed At Hyundai A Couple Days Later My Fuel Started Falling Fast When Driving....