Hi,
I have a long thread, with lots of pictures of the aerodynamic mods that I have done to my Scion xA, over at EcoModder.com
The grill block and the fog light covers were the best improvements = +10% or so.
The smooth wheel covers helped ~6% or so.
The rear wheel skirts, and the zigzag tape helped some, too.
I'm still keeping above 41mpg even during the winter cold and ice and snow. Before I started ecodriving, my best MPG on a tankful was 42.5, so getting just shy of this for my worst tankful during a New England winter, is a good thing; if I say so myself!
Comments
I'm on page 6 of the ecomodder thread.
I think it was "Thank you for posting both the good and the bad mods, so I know what does and does not work. My 2005 xA fears the knowledge that I have now. I haven't done any mods, but I am intrigued by the grill block. I average 36mpg, but would love to average 40."
Is this what your car looks like?
BIG picture of 2004-2005 xA
You may be able to use trimmed pipe insulation to block the grill w/o much affect on the looks:
Prius grill block
another Prius grill block
Sincerely, Neil