I occasionally read up on contributor's posts there, usually with a smile.
My opinion: not enough "eco", too much "mod".
Similar results are achieved without resorting to the degree of personalization many do. I won't call the changes "improvements" because they are not an improvement.
What's the EPA highway rating for a '92 Civic?(49) What percentage improvement is an aeromodded 90 mpg?(+85%)
Now, what's the EPA rating of an '05 Passat?(34) What percentage improvement is a bone stock 68 mpg?(+100%)
Or a '96 Passat?(41) compared to 82 in my sedan?(+100%), or 78 in my wagon?(+78%).
Tinted windshield banners, Altezza taillamps, fuzzy dice have about as much effect on fuel economy as some of the changes these guys do.
Strictly a personalization.
<edit> b.t.w.: 90 mpg on gasoline contributes as much fossil CO2 greenhouse gas per mile as 23 mpg on B100 biodiesel. 80 mpg on B100 is equivalent in CO2 GHG contributions to 300+ mpg with gasoline power.<end>