The sixth episode of the Johncast! Show Notes:

Credit to Kevin MacLeod for his awesome music from Incompetech, including Overworld, which I used in this episode.

"Upbeat Forever","Happy Happy Game Show"Kevin MacLeod (incompetech.com)Licensed under Creative Commons: By Attribution 3.0http://creativecommons.org/licenses/by/3.0/

Thanks to audioblocks.com and orangefreesounds.com, for the awesome sound effects and music.

Here is the riddle's answer: No, because gasoline was used, making the truck lighter!