We Drove 90 Miles Off the Interstate to Fill Up 62 Cents Cheaper

Sixty-two cents a gallon. That was the entire argument I made at mile marker 254 on I-10 in west Texas, one hand on the wheel of our Honda Passport, my wife holding her phone with GasBuddy open like it owed her money. The Pilot at the Fort Stockton exit was charging $3.89. Marfa, down where the interstate forgets about you, wanted $3.27. I took the exit.

The $9.67 was never the only number on the table. The fuel light had come on 20 minutes earlier with 318 miles of home still stacked ahead of us, two kids asleep in the back seat, and a July sun that turns a stranded SUV into a genuine emergency instead of an inconvenience. Range was the real number on the table, not price. I had maybe 40 miles of fumes left when I made the turn. My wife said that part out loud too.

I want to defend myself and I cannot, cuz the twist of this story is that the arithmetic was never on my side, not at mile 10 and not at mile 60, and my wife ran it four separate times that afternoon with the same result on every pass. The number I kept reaching for was 62 cents. Sixty-two cents has never once beaten 90 miles of west Texas, and I now own a receipt that proves it.

the Pilot at exit 254

The Passport takes 15.6 gallons on a good fill, and the fuel light had just come on outside Fort Stockton, which is the moment every gas price becomes negotiable to a certain kinda man. I am that man. The Pilot's sign glowed $3.89 and my wife said fill it here, and I said a certain app disagrees, and she said the sentence that should have ended the whole debate: Marfa is 45 miles south, so 90 round trip. She said that number out loud, twice. I heard it. I turned anyway.

the math at mile 30

Somewhere around mile 30 of TX-17 she opened the notes app and began running it live, narrating like a flight controller. The tank holds 15.6 gallons. Sixty-two cents times 15.6 is $9.67 saved. The detour runs 90 miles at 21 miles per gallon, which is 4.29 gallons, which at $3.89 is $16.68 spent. Net position: down $7.01. She read that total out loud, then re-ran the whole thing cuz she assumed she had made an error. The math was fine. The driver was the error.

the 40 miles of fumes

The part of the story my wife tells first now, when she tells it at all, is the range gauge. Forty estimated miles remained when I turned south, and the Passport's estimate dropped to 34 somewhere in the first valley, then to 29 climbing outta it, each number landing in the cabin like a slight fine. The kids woke up around mile 40 and asked where the gas was. I said ahead. She said barely. The distance from 29 to a Valero pump was the longest 11 miles of the trip, and no app has a category for that kind of cost, so it never appears in anyone's spreadsheet, which is exactly how these detours keep winning.

she ran it four times

Mile 50, same math, new total field. Mile 62, same math, and she added an environmental damages column for the exhaust. Mile 70, she asked whether the GasBuddy price for Marfa was from this month or from the Obama administration, which is a fair audit of a crowd-sourced app that runs on volunteers. I defended my position with the strongest argument available, which was that we were already 70 miles in. Sunk cost, she said. I said the road is scenic at least. Neither of us blinked for the last 20 miles.

15.6 gallons of vindication

The Valero in Marfa was real and it was $3.27, a fact I would like carved somewhere permanent. The pump clicked off at 15.6 gallons even, $51.01 on the display, and I stood there holding the receipt out toward her like a court exhibit in the case of the man versus the spreadsheet. Two things were true at once. I had paid $16.68 in detour gas to save $9.67 at the fill-up, a confirmed loss of $7.01, and the ice cream parlor across the street was open. My wife pointed out the ice cream does not appear anywhere in the spreadsheet.

what the tacos cost

Dinner was tacos al pastor at a walk-up window on the Marfa square, $24.75 for the two of us, and honestly the detour was worth it for that window alone. My wife does not accept the word worth in that sentence. Her position is that tacos are a separate budget line and the gas decision stands on its own at negative seven dollars and one cent. Her position is correct. I married someone who re-runs the math, and part of me knows the whole trip ran smoother because one of us can be trusted with numbers.

the rule we drive by now

The rule that came outta the desert is short. Gas stops get decided by range, not by price: if the light is on, the next reasonable station wins, and the app gets consulted the night before, not at the exit ramp. A 62-cent spread is real money, $9.67 once you multiply it out. It is not bigger than 90 extra miles. Apps make prices look like information when half the time they are bait with a MAP pin on it, and the driver who chases them is paying for the chase in his own tank.

the way home

We took I-10 east at sundown, tank full, 96 minutes of detour behind us, and somewhere past Balmorhea she read the notes app total one last time, down $7.01, and closed the phone with the calm of a judge dismissing a case. The Pilot at exit 254 would have charged me $60.68 for the same 15.6 gallons. I paid $67.69 all in and got a tour of the Davis Mountains foothills and the best taco of the year outta it. The tacos do not count, she said. That is it. That is the whole ledger.