<VV> Fuel mileage and the cold

[HallGrenn at aol.com]

In a message dated 2/20/2010 6:19:29 A.M. Eastern Standard Time,  
jvhroberts at aol.com writes:


Increased air density and viscosity at lower temperatures, as I  already 
mentioned. 



John  Roberts




-----Original Message-----
From:  ScottyGrover at aol.com
To: VirtualVairs at corvair.org
Sent: Fri, Feb 19,  2010 10:05 pm
Subject: Re: <VV> Fuel mileage and the  cold


Pardon my apparent stupidity, but what caused the difference  in  
aerodynamics?

Scotty from Hollyweird

In a message  dated 2/19/2010 6:35:03 P.M. Pacific Standard Time,   
jvhroberts at aol.com writes:

My 2005  Subaru Legacy GT has an  instantaneous as well as average gas 
mileage feature.  This has a  turbo intercooled engine. On the same road 
that I 
drive a few times   a week (flat, no turns, no intersections), in the 
summer, 
it's  instantaneous  MPG at 65 is 29. In winter, its instantaneous MPG is 
25.  
Worked through the  air density and viscosity equations for  aerodynamic 
drag, and that accounted  for ALL the difference. It  really doesn't seem 
to be 
an engine issue, it's an  aerodynamics  issue. 



And the snow on top.
 
Bob