Is this an unreasonable request?

[imzjustplayin]

I've made it a resolution not to go to the gym unless my vehicle gets 50mpg in the city. To address this issue, I plan on getting a '94-'95 Civic LX 4 Door sedan, replacing the transmission with a VX transmission, putting a D15Z1 engine in and possibly (if necessary) implementing weight reduction measures in order to achieve this figure. If the weight reduction isn't enough and or is too expensive, then I'll implement certain hypermiling techniques such as Pulse and Glide and whatnot.

The reason I have decided this is because the only time I went to the gym was during school since my school was near by, unfortunately when school was out, so was my gym schedule as I could not see myself driving to and from the gym just for the sake of working out. Getting 17-24mpg on the vehicles I have access to makes me not want to go to the gym unless it's on the way. I like going to the gym but everytime I start getting results, I end up stopping due to reasons I feel are beyond my control.