I have seen no change since weather has started to change for my Tahoe consistent on last few tanks only thing has changed is Gas prices rising ...
I am just shifting in 4th @45mph sweet spot seems to be 60mph running @ 1700rpm.
Nice thread interesting #'s
2012 Chevrolet Traverse *active*
2002 Oldsmobile Alero GLS *active*
2002 S10 2wd p/u 139,000mi. *active*
1975 Corvette Stingray *active*
1994 Camaro Z28 Convertible 149k *Sold 2013*
1998 Blazer ZR2 189k *Sold 2012*
1995 Tahoe LT 250k *Sold 2011*