MPG difference between summer/winter blend gas

[Bamaro]

There is no easy way to determine how much better summer MPG is related to gas formulations or temperature conditions.

 

[InvalidUserID]

I've seen my MPG drop from 30-32 MPG to 28-29 MPG the past two or three months.

I have a gas log app and looked back the past few years to see if I saw a similar drop and I did. It's been about a 1-2 MPG difference the past three winters.

 

[NHHEMI]

70 degrees in October gives 2 MPG +/- less than 70 degrees in May. Only difference is in October the fuel is the winter blend. Been dealing with it for a long time here. People can say what theyw ant about it is this or that and not the fuel but I disagree. Winter blend fuel reduces MPG.