[alohaspirit]

Originally Posted by MetroMPG

Conditions:

Grenadier Island Past 24 Hour Conditions
Date / Time (EST) ... Conditions ... Temp (°C) ... Humidity (%) ... Dew Point (°C) ... Wind (km/h) ... Pressure (kPa) ... Vis (km) ... Wind Chill
15:00 ... N/A ... 2 ... 59 ... -5 ... calm ... 101.8 ... N/A ... *
14:00 ... N/A ... 2 ... 57 ... -5 ... W 2 ... 101.7 ... N/A ... *

Speed: 90 km/h (56 mph)

Route: straight & practically level 1.6 km stretch of 2-lane highway, no other traffic ahead of me in my lane, infrequent oncoming vehicles in the other lane.

A = boat tail on
B = boat tail off

Readings in MPG (US):

    east    west    avg    
A    66.4    62.6    64.5    
A    65.2    62.8    64    
A    65    64.4    64.7    64.4 (avg these A runs)

B    56    56.6    56.3    
B    55.9    56.5    56.2    
B    54.3    56.3    55.3    55.93333333 (avg B runs)

A    65    64.3    64.65    
A    64.2    64    64.1    64.375 (avg these A runs)

64.39 A avg (all A runs)
55.93333333 B avg

15.1% improvement, A over B

for +8.46 mpg

I had to bump this up