Hyundai Sonata Engine Poor Mileage

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. For...

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...

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 A...

Hi, I Have A 4 Cyl 04 Manual Sonata, I Have Been Having Major Engine Issues For The Past Year. In July On 12, I Replaced All The Spark...

Fuel Consumption Is High. It Takes Time To Change Gears When It Is At A Speed Of 120km/h And You Exelerate To Over Take It Changes To Gear...