Did I Break Your Economy Calculation?

https://imgur.com/a/t9jQx
The economy of the engine is off the charts in a bad way, .56%, or 21.6 lb/(hph). (This was intentional, I'm not that bad at this game)
The economy of the very heavy car I put it in is off the charts in the other direction, 282 mpg. Something doesn't math.
The economy of the engine is off the charts in a bad way, .56%, or 21.6 lb/(hph). (This was intentional, I'm not that bad at this game)
The economy of the very heavy car I put it in is off the charts in the other direction, 282 mpg. Something doesn't math.