So I FINALLY got some snow to run around and test out my "new" project. Runs like a scalded dog!!

It starts with a mere flick of the key, or one pull if I choose to look like a commoner!lol!
Got the appropriate period one piece snowsuit, helmet, glasses, fake mustache and hard-case travel bar mounted(any "man of leisure" in the early 70's would be so equipped!)complete with a bottle of Jameson, Korbel, and Johnny Walker Red...
BUT...
I have NO idea how far my little time machine will take me on one tank(5 gal) of gas...
So, ballpark, what can I expect on my maiden voyage?
Thanks...