Both entry 6 and entry 5 are intriguing. What would it look like if the circular symbol before the wording encircled the name "Food FWD" rather than going before it. Italisizing the FWD or the font in general may show/highlight the idea of movement.
Entry #135 is intriguing. The truck seems a little crowded, could something be done to simplify it such as removing the bars on the back or removing the seat from the cab? I also like the gradation of color in the name on #135. I'd also like to see #135 with different colors in the tag-line. Possibly another shade of green or another color that you think works well with the theme.
Like the removal of the bars and seat in #141. Looks like the entire backend of the truck got truncated a bit. Could you make the back more rounded?
Also, would #31 and #141 become too busy if a third color was introduced (maybe for the tag line or a leaf/leaves)? A yellow (similar to leaf in #6) or orange/red.
The orange leaves on #154 don't look as sharp as the white leaves of #141. What if #141 had the yellow of #6 added instead of the orange? Would yellow look better? or rework another color scheme you would like to try out on it - IF you try a new color scheme it would be nice to see blue in it.