CHEVROLET CAVALIER ENGINE POOR MILEAGE

Hi, I Have A 2000 Chevy Cavalier And It All Of A Sudden Started Getting Horrible Gas Mileage. I Was Getting 26mpg In The City. Now I Have...

98 Chevy Cavalier 130,000 Miles, Automatic, 2.2 Engine (i Believe). The Situation Is That My Mpg Have Dramatically Drop In The Period...

My Cavalier Is A Z24 With The Original 3.1l V6. When Cool, The Engine Runs Fine For About 20 Miles And Then I Can Feel A Change. The Whole...

I Have Done Everything From A Simple Tune Up To Minor Modifications To Try And Gain Gas Mileage. Now I Will Tell You That I Do Have A Lead...