A pretty simple barometer that I use is the pump price. No, not the price of a gallon of fuel, because that's actually pretty close across the country, but the amount of fuel purchased, and I've been seeing this more and more often:
It's an even better indicator if it's a flat amount. Like $5.00. or $3.00
So next time you're at the pump, look at the previous purchase.
3 weeks ago