Which muffler is better

I have a 40 series flow master muffler and it sucks up alot of gas I was thinking of the 50 series but you be the judge.

What do you mean?

Quote from Jeepster17

it sucks up alot of gas

I had 40 Series Delta Flow on my Dakota and i was mashing the gas pedal all the time to hear that great sound.

Yeah, the first 02 sensor is for the fuel delivery, the second one is just to tell the computer the cat is working properly

Well when i had the stock muffler on it I could go to ocean city which is about 100miles and make it with about 3/4 of a tank of gas. Now with the 40 series I get just under a half a tank..

Quote from Artie

winter gas burns quicker

i dont know if you are being smart but mine seems to be....

Quote from Jeepster17

Well when i had the stock muffler on it I could go to ocean city which is about 100miles and make it with about 3/4 of a tank of gas. Now with the 40 series I get just under a half a tank..

I would think that there is probably something else going on. It might be your right foot. If you don't think that is it then there is probably something else going on. With better flow over stock you should get better MPG.

Quote from clendaniel

http://www.google.com/search?q=oxygenated+fuel

Quote

With regard to fuel economy, the theoretical change in fuel economy as a result of the addition
of oxygenates to gasoline is in the range of a 2% to 3% reduction in fuel economy. Existing
research indicates that real world fuel economy changes correspond to changes in energy
content. A 2% to 3% reduction in fuel economy equates to a less than 1 mile per gallon change
in fuel economy for a car that averages 27 miles per gallon.