I guess I don't see the logic in paying for a new vehicle to save money on gas?
For example, my 4th gen is paid off and gets something like... 13-ish average these days for my driving (I'm just going to go with that number for sake of simplicity)
At 13mi/gal I am looking at roughly 273mi/21gal tank at $8/gal = $168 per fill-up. I probably fill up my 4Runner twice in a month on average? so we'll say $336/mo ($4032/yr) in fuel costs.
That's still lower than the cost of fuel plus a car payment on a newer vehicle. Building a '22 Rav4 Hybrid (because for whatever reason Toyota won't make the Corolla hatchback in AWD and I can't get a GR Corolla) in Limited comes to about $39,290, with a $2k down payment at 7.44%APR (good lord) on a 72mo finance is... $644/mo ($7728/yr) + $116/mo (1392/yr) in fuel (14.5gal tank * $8, given the we'll say 38mpg I would probably get, I'd only fill up once a month with my driving habits).
Let's say you got a used car, most used vehicles are not going to get significantly better mileage to offset the roughly 15-20k minimum you will spend on a passable used car that gets better gas mileage at this point. Lets assume you somehow managed to find a junker for $5k that gets 22mpg; that vehicle will still probably need another $2-5k in bare minimum work to make it safe and reliable enough to be worth driving. So let's call it $7k with a 15gal tank, that's about $240/mo ($2880/yr) in fuel costs because even at 22mpg I'll fill it up twice a month. So even in this more ideal case, I'm spending an up front cost of $7 for the first year, plus god know how much in constant repairs and being unsatisfied with the jalopy I'm stuck in... to save $1152/yr in gas for the 4Runner. That's before you factor in insurance, registration, and other fees on a second vehicle.
I don't know... maybe I am wrong in my math here... I just don't really see the benefit in getting a second vehicle because of gas prices. I guess in this crazy market I could sell the 4Runner for more than it's worth and get a newer vehicle... but then I'm sacrificing what I enjoy for something I will hopefully learn to like?