For some odd reason I feel like Jerry Seinfeld listening to one of Kramer's idiotic ideas.

For one thing, judging from the level of my tank and my average use, I will need to get gas soemtime between May 14 and 17; so I won't be buying gas on the 19th anyway.

Secondly unless you plan to use your car less and use less gas total rather than not purchasing it on the 19th only to tank up on the 20th, this "plan" will not work

Thirdly, did I mention how asinine this plan is?