What mileage you getting with temps under 30 degrees ?

[50MPGDream]

Originally Posted by BailOut

Since I install an engine grille block each winter I do not notice any more mileage hits on the coldest days versus the average days. I still feel the overall hit of winter fuel and slower trips over the mountain due to snow and ice, though.

I generally go from averaging 47 MPG in the summer to 44 in the winter.

I wonder if the fuel maps in the automatics are different than the manual cars, I also have a full grill block and any time when the temp dips to below 20*F it seems to really kill my MPG. (my 20% drop in the winter as opposed to your 7%)

The water temp is still staying in the 184-188 range, but it seems at any given RPM I'm sucking more gas, the only difference I can attribute this to is the intake air temp

anyone else have any thoughts???

[voodoo22]

Originally Posted by 50MPGDream

I wonder if the fuel maps in the automatics are different than the manual cars, I also have a full grill block and any time when the temp dips to below 20*F it seems to really kill my MPG. (my 20% drop in the winter as opposed to your 7%)

The water temp is still staying in the 184-188 range, but it seems at any given RPM I'm sucking more gas, the only difference I can attribute this to is the intake air temp

anyone else have any thoughts???

I don't know if your issues have to do with driving an AT.

I have no grill block, an AT and am seeing a hit of 9% max so far.

[metalshark]

Originally Posted by 50MPGDream

I wonder if the fuel maps in the automatics are different than the manual cars, I also have a full grill block and any time when the temp dips to below 20*F it seems to really kill my MPG. (my 20% drop in the winter as opposed to your 7%)

The water temp is still staying in the 184-188 range, but it seems at any given RPM I'm sucking more gas, the only difference I can attribute this to is the intake air temp

anyone else have any thoughts???

I'm thinking the ATF gets cooled off a lot more than the grease in a MT and has a resultant higher mean winter viscosity.