Tune + Code Weather = Bad MPG?

[mhorn0817]

notice every winter mpg in the denali goes to crap...tank of gas usually last 1.5 weeks on average. winter time / cold time im lucky if i get a week out of a tank. could this be from being tuned? just curious

 

[NJTaho]

I don't think the tune would affect your MPG's in the winter.
Do you warm you vehicle up in the morning?

 

[JochenWoern]

notice every winter mpg in the denali goes to crap...tank of gas usually last 1.5 weeks on average. winter time / cold time im lucky if i get a week out of a tank. could this be from being tuned? just curious

Take a look at this thread, it may help explaning the situation:

http://www.tahoeyukonforum.com/forum/showthread.php?t=35128

 

[OHSIXX]

Winterblend fuel causes crappy gas mileage....I lose about 2-3 mpg's....a tune should have no bearing on your loss of fuel mileage

 

[94z28guy]

yep winter fuel

 

[JennaBear]

X3

 

[domin8]

Winter blend ftl. :-(

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