<VV> Fuel Milage in winter - only minor Corvair

[John Beck]

Interesting info.  I hadn't thought about the difference in winter fuel.
That might help to solve the curiosity I always had about my '95 Mazda
pickup.  It got 25 - 28 mpg fully warmed on the highway in the summer
and 17 - 19 mpg fully warmed on the highway in the winter.  A few of the
other things on Rad's list might have been factors but I've never driven
any other vehicle that changed as much.  --J.B.

Jim Burkhard wrote:
> 
> In addition to the stuff already posted, winter fuels often
> (but not always) have higher levels of oxygenates (used to
> be mostly MTBE, now mostly ethanol), which have lower
> heating values (fewer BTUs per gallon).