If drivers in the United States start favoring fuel-efficient cars over SUVs, will gas be cheaper or more expensive?

In case you havn't noticed the price of EVERYTHING in the world is simply supply and demand.

And the oil companies have 100% control over gas prices because they control the supply.

When gas prices get too low they merely fake a refinery fire or blame the middle east even though they buy ZERO oil from them.

We have so much oil and gas in the US that we EXPORT most of it.

The US has in FACT been "energy independent" for many decades and if all export sales of fossil fuels were banned, we would have enough for the next 10,000 years.

Lower demand...lower price. 

With Biden as President we'll be lucky not to be paying $10/gallon soon! 

When the demand is high, the price is high. When the demand is low, the price is low. Hence, when Covid hit last year and people drastically reduced their car use, gas prices dropped. While one might think demand would also go down with more fuel efficient cars, people are generall driving more every year and the population is increasing, so demand won't decrease.   In the USA, average miles driven per car has risen from 10,000 to 15,000 miles per year since the 1990's, which has more than offset the cars being about 30% more fuel efficient. . 

Alot of people hate on suv's but in reality it's much better in the snow then my old corolla was. Plus alot of newer suv's drive on the same platform as sedans and handle much better then the older ones. So i don't think suv's are going anywhere especially if you live in a snowy climate. 

Neither.  if people switch to small cars, they may drive more.

There is a glut of oil worldwide.  Oil and gas will be relatively cheap for a long time.