CHEVROLET ENGINE POOR MILEAGE

I Changed The Muffler On My Car And It Started Giving Me Bad Mileage. My Mechanic Hooked Up Something To The Car Comp. And He Says That The...

On My 2001 Chevy Tracker, 120,000 Miles, One Cylinder Is Reading 50 On The Compression Test Instead Of 150. New Coil Didn't Help. Should...

The Engine Temperature Will Not Maintain At 195 Degrees F. It Will Reach That Temp, Very Briefly, But Then Falls To About 155 F And...

I Replaced The Thermostat, Radiator And Radiator Cap And The Engine Temp Will Not Stay At Or Near 195 Degrees. It Drops To 150 Degrees Once...

I Have Repaire Plugs And Wires In My Truck, Still Has A Miss To It And Poor Gas Mileage, What Could It Be?

Was Getting 32.4 Mpg On Highwat And 21 Mpg In Town. Had Oil And Filter Changed At Dealers And Mileage Went To 17 Mpg On Highway And 12 In...

As I Was Driving Home From Work This Evening My Mpg Went From 28 Mpg To 10 Mpg. What Could Be Wrong?

I Am Getting 12-13 Mpg Fuel Efficiency From My Car On Average. This Seems Low To Me. Can I Do Something To Improve It?

I Have What Acts Like A Low Speed Miss, I Am Pretty Sure It Is Mechanical -u-joints, Rear Axle, Rear End, Etc Runs Fine After 30 Mpg, Or If...

I Have A 1986 Motor Home With A Chevy 454 4 Barrel Carb And Am Looking For Ways To Improve My Gas Mileage. I Currently Get About 5 Mpg, But...