I’ve always believed this is a market that’s not hard to manipulate. It isn’t simply supply and demand.
In 1999, in PA, gas prices: 99 cents, $1.099, $1.199.
10 cents difference between 87/87/93
Across the River in NJ? 20 cents cheaper.
One day, Katrina hit, 20 years ago.
First time it went over $3.
$3.099, $3.199, $3.299
Across the River? 20 cents less.
The above to me signifies the ability to set pricing.
It has also ring true with taxes. If NJ got a new tax, and PA did not? PA prices also went up and yes, same differential as pre NJ tax.
The spread between states isn’t any longer 20 cents, it’s closer to 40, sometimes 20.
Also the spread between grades isn’t 10 cents, and some have eliminated 89. Some like Wawa (tricky) 93. I personally avoid unbranded gasoline.
And premium is not substituted easily the way it was in 1999. Today many 4 cyl vehicles actually use it, as do their drivers especially if they own the vehicle.
So why doesn’t it go down, it doesn’t need to. But we go to costco in NJ to try to do our best on buying 93.