Just for grins, or growls, I kept track of my gas purchases. Only once did I pay more than my local Costco for high test. One thing I did notice was that the regular was only 85 octane in the higher elevation areas. I just stayed with high test and spent $702.35 for 173.9 gallons. Average price was $4.04 and I got 17.25 MPG. Not unhappy with the MPG but would sure like to see gas prices from a coupe years ago.
