Also , the gasoline will shrink in your tank once it gets above ground.

 

sooo what is this winter gas........us down her passed the mason dixon line dont have this i dont think, least not that i know off. what the diference?

 

I have gone from a constant 19-20 MPGs down to 17-18 MPGs and I live in South Carolina. The mileage dropped in the last few weeks.

 

I use Exxon exclusively and have lost 2 mpg since the winter blend.

 

A drop in MPG in the winter months is not all to blame on winter gas. The cooler air is also to blame. Modern efi engines are made to maintain a certain air/fuel ratio based on several outside variables such as air temp, engine load, throttle position and so on. General chemistry will tell you that cooler air is more dense. This means If everything else is the same, but the air is cooler, then a larger volume of air will enter the engine, this is usually measured by a maf or map sensor and the engine will inject fuel accordingly. More air equals more fuel which will cause a drop in mpg. The plus side is you get more power if you are using something other than winter gas, c16 for instance.

 

An interesting read on winter gas.

http://www.zhome.com/ZCMnL/PICS/wint...winterGas.html

 

i just checked my mileage today 11.8 all highway drivin 70mph its startin to **** me off.

 

Try living in a state that requires "winter fuel" (at least 10% ethanol at all times) all year. They say it’s better for the environment, but problem is that they cannot ship it through normal pipelines since it is so corrosive. So, once you add in the trucking and processes used to make it, ethanol ends up being worse for the environment.


.z