okay, so lets assume that You have a 10 mile roundtrip daily commute (7 days a week). Assume You have a 15 gal tank and get 15 mpg.
You can go to commute 22 times before refilling. 3 weeks.
If You manage to bring that upto 20 mpg, then You can go 30 days before refilling. 4 weeks.
All You’re doing is delaying Your expense.
If You adjust Your routine and cut down to 8 miles per day. You can make it 5 weeks.
And so on…
It’s not that anyone is paying any less
<shrug>
Do what You can to make Yourself happier with the situation, but in the end You choose to drive - You choose to pay.