Gas mileage has dropped?

[Denise Hayes 2]

My V-8 has been getting at least 18 mpg., but the last 2 tanks has dropped to 16 mpg. No different driving, anyone have an answer? Anyone else had this happen with the 07?

 

[Chris MacAdams 2]

Check your tire preasure, its crazy how much under inflated tires can effect mileage

 

[Denise Hayes 2]

I'll check that, thanks.

 

[Kevin Palmer]

Air filter will do the same as well as a dirty fuel filter. But the air filter is the second biggest culprit behind low tire pressure.

 

[Dennis Smink]

I have experienced the same thing with my 2001 Ford Ranger (4.0 L). I think it is because they are starting to put in ethanol in preparation for the winter. BTW, I live in the People's Republic of Maryland. It may not be the same in Louisiana. It was getting a little over 17 mpg last winter then when they took out the ethanol for summer it started getting a little over 19.



My wife and I were in South Dakota a few weeks ago. The middle grade fuel was cheaper than the regular. I asked my brother-in-law what was up. He said the middle grade has ethanol and unless it is dramatically cheaper don't get it because of the difference in mpg.

 

[Denise Hayes 2]

Well, one tire had 29.5 psi and the others had 30psi, inflated to 32psi. Hope this is the answer.

 

[EddieS'04]

I would run them at 34psi...

 

[Denise Hayes 2]

I was going by the manuf. tag on drivers door. It said 32psi, so I assumed thats what it should be.

 

[EddieS'04]

The manufactor tag is usually set up for the best ride and not be too low for the weight. You can safely run them at the max cold pressure written on the tire it self.