Gas is one of those expenses that feels completely outside your control. The price goes up, you pay it. The price goes down, you feel briefly relieved. Either way you’re filling the tank because you have to and paying whatever the pump says.
That feeling of powerlessness is understandable — but it’s not entirely accurate. You can’t control the price of gas. You can control how much of it you use, where you buy it, and how much you pay per gallon at that specific pump. Those three levers, applied consistently, produce real savings every single week regardless of what gas prices are doing nationally.
This is the first of our transport articles — and gas is where most households have the most immediate room to save. We’ll cover insurance and maintenance in our upcoming guides, but for weekly impact, this is where to start.
Find the Cheapest Gas Near You
The single fastest saving available on gas costs nothing and takes about 30 seconds.
Gas prices vary significantly between stations in the same area — sometimes by 20-40 cents per gallon between the cheapest and most expensive options within a few miles of each other. If you’re filling a 15-gallon tank and the cheaper station is 25 cents less per gallon, that’s $3.75 saved on one fill-up. Over 50 fill-ups a year that’s $187.50 — from just choosing a different station.
GasBuddy is the most widely used app for finding cheap gas near you. It crowdsources real-time prices from users at stations across the country and shows you the cheapest options in your area on a map. Free to use, accurate, and worth opening before every fill-up.
Google Maps now shows gas prices at nearby stations directly in search results — search “gas near me” and prices often appear without needing a separate app.
Waze also displays gas prices at stations along your route, which is useful when you’re already driving.
THRIFTY HABIT #96 Make checking GasBuddy before filling up a 30-second habit rather than an occasional thing. The difference between the cheapest and most expensive stations in most areas is significant enough that this single habit pays back immediately and every week indefinitely.
Use Warehouse Club Gas Stations
If you have access to a Costco, Sam’s Club, or BJ’s membership — or are considering one — the gas station is one of the most consistent money savers in the membership.
Warehouse club gas stations typically price 10-25 cents per gallon below nearby competitors. On a 15-gallon fill-up that’s $1.50-3.75 saved compared to a regular station — and for households that fill up weekly, that adds up to $78-195 per year from gas alone.
Combined with the grocery savings from our buying in bulk and discount grocery stores guides, warehouse club membership often pays for itself through gas savings alone before you’ve bought a single item inside the store.
The trade-off: warehouse club gas stations often have lines, particularly during peak times. Going early in the morning or on weekday afternoons avoids most of the wait.
Use Grocery Store Fuel Rewards Programs
Many major supermarket chains — Kroger, Safeway, Giant, and regional equivalents — offer fuel rewards programs where grocery purchases earn points that translate to cents-per-gallon discounts at affiliated gas stations.
The typical structure: every $100 spent on groceries earns 10 cents off per gallon at the affiliated station, redeemable on one fill-up. Some promotions offer significantly more — bonus fuel points on specific products, double points events, or promotional periods where points accumulate faster.
If you’re already shopping at a supermarket with a fuel rewards program, make sure you’re using your loyalty card consistently to capture these rewards. The discount can be significant — 50 cents off per gallon on a 15-gallon fill-up saves $7.50 on a single tank.
THRIFTY HABIT #97 Check your grocery store’s fuel rewards balance before filling up anywhere else. If you have accumulated rewards, use them — they typically expire at the end of the month. Many people let fuel rewards expire simply because they forget to check.
Use Gas Cashback Apps and Credit Cards
On top of finding the cheapest station and using loyalty rewards, cashback on gas purchases adds another layer of saving with minimal effort.
GasBuddy Pay: GasBuddy offers a linked payment card that saves 5-25 cents per gallon at participating stations. The savings are applied directly at the pump — no rebate to claim, just a lower price when you pay with the card.
Upside (formerly GetUpside): An app that offers cashback on gas purchases at participating stations. Check the app for available offers near you, claim the offer before you pump, then submit your receipt for cashback. Typically 5-25 cents per gallon at participating locations.
Cashback credit cards: Several credit cards offer elevated cashback on gas purchases — typically 3-5% back. If you pay your balance in full each month (critical — carrying a balance eliminates any cashback benefit and then some), a gas-category credit card is a consistent passive saving. Cards worth checking: Citi Custom Cash, Blue Cash Preferred from American Express, and various bank-specific cards with rotating categories.
WORTH IT / SKIP IT Using a cashback credit card for gas: WORTH IT if you pay the full balance every month without fail. SKIP IT if you carry a balance — the interest cost eliminates the cashback benefit immediately and significantly.
Drive More Efficiently
The price at the pump is only part of the gas cost equation. How efficiently your car uses that gas determines the other part — and driving habits have a significant impact on fuel economy.
Slow Down on the Highway
Fuel economy drops significantly at higher speeds. Most vehicles reach peak efficiency at 45-55 mph and use meaningfully more fuel above 65 mph. Driving 70 mph instead of 60 mph can reduce fuel economy by 15-20% on highway trips.
On a regular highway commute, driving closer to the speed limit rather than consistently above it produces measurable gas savings over time — with the added benefit of avoiding speeding tickets.
Accelerate and Brake Gently
Aggressive acceleration burns significantly more fuel than smooth, gradual acceleration. Hard braking wastes the kinetic energy you burned fuel to create. The driver who accelerates smoothly and anticipates stops — coasting toward a red light rather than accelerating to it — uses meaningfully less fuel than one who drives aggressively between stops.
This is particularly impactful in city driving where stop-start patterns are constant. Smooth city driving can improve fuel economy by 10-30% compared to aggressive driving in the same conditions.
THRIFTY HABIT #98 Imagine there’s an egg between your foot and the accelerator pedal. Accelerate as if you’re trying not to break it. This mental image — used by fuel-efficient driving instructors — produces exactly the smooth, gradual acceleration that maximizes fuel economy without making you drive unreasonably slowly.
Reduce Unnecessary Idling
Idling gets zero miles per gallon. A car idling for 10 minutes burns roughly the same fuel as driving 5 miles. Warming up a modern car for more than 30-60 seconds is unnecessary — modern engines don’t require the extended warm-up that older vehicles did.
Turn off the engine when you’re waiting for more than a minute or two — in a parking lot, at a long train crossing, picking someone up. Modern starter motors are designed for frequent use and the fuel saved significantly outweighs any marginal wear.
Use Cruise Control on Highways
Cruise control maintains a consistent speed more efficiently than a human foot can — eliminating the small speed fluctuations that waste fuel. On long highway drives, consistent use of cruise control improves fuel economy meaningfully compared to manually maintaining speed.
Keep Tires at the Correct Pressure
Underinflated tires increase rolling resistance, which means your engine works harder and burns more fuel to maintain speed. A tire that’s 10 PSI underinflated reduces fuel economy by roughly 0.2% per PSI — across four tires that’s a meaningful reduction.
Check tire pressure monthly — it drops naturally over time and with temperature changes. The correct pressure for your vehicle is on the sticker inside the driver’s door frame, not on the tire itself (the number on the tire is the maximum, not the recommended).
A tire gauge costs $5-10 and is one of the best small investments for ongoing fuel savings. Most gas stations also have air pumps — many free, some requiring $1.
Reduce How Much You Drive
The most obvious gas saving of all — using less gas — is often the least considered because it feels like the biggest imposition. But small reductions in driving add up significantly.
Combine Errands
Instead of separate trips for different errands on different days, batch everything into one trip with a planned route. Each separate trip involves a cold-start (which uses more fuel than a warm engine) and often inefficient routing. One planned multi-stop trip uses significantly less fuel than the same errands done separately.
Work From Home When Possible
If your job allows any work-from-home flexibility, even one or two days per week produces meaningful gas savings. A 20-mile round trip commute burning 1 gallon of gas at $3.50/gallon, saved twice a week, saves $364/year — before accounting for reduced wear on the vehicle.
Carpool for Regular Trips
Splitting a commute with one other person cuts fuel costs in half. Even an informal arrangement — alternating driving with a neighbor who works nearby — produces consistent savings with minimal coordination.
Walk or Bike for Short Trips
The shortest car trips are also the least fuel-efficient — a cold engine on a 5-minute trip barely reaches operating temperature and burns disproportionately more fuel per mile than a warm engine on a longer trip.
For trips under a mile or two, walking or biking is often faster door-to-door than driving when you factor in parking, and it costs nothing. For trips under 5 miles in reasonable weather, it’s worth asking whether the car is actually necessary.
Maintain Your Car for Better Fuel Economy
A well-maintained car uses fuel more efficiently than a neglected one. A few maintenance items directly impact what you pay at the pump:
Air filter: A clogged air filter restricts airflow to the engine and reduces combustion efficiency. Replacing a dirty air filter is a simple DIY job — the filter slides out of a housing under the hood and a new one costs $15-25. Check it annually or every 15,000-20,000 miles.
Spark plugs: Worn spark plugs cause incomplete combustion — fuel that doesn’t fully burn is fuel you paid for but didn’t use. Replacing spark plugs per the manufacturer’s schedule (typically every 30,000-100,000 miles depending on type) maintains combustion efficiency.
Oxygen sensor: A failing oxygen sensor causes the engine management system to run the fuel mixture incorrectly — often burning more fuel than needed. If your check engine light is on, getting it diagnosed is worth it for fuel economy reasons alone.
Motor oil: Using the manufacturer-recommended oil viscosity and changing it on schedule keeps the engine running at designed efficiency. Using a thicker oil than recommended increases internal friction and slightly reduces fuel economy.
Putting It All Together: A Weekly Gas Saving Routine
| Habit | Frequency | Estimated Saving |
|---|---|---|
| Check GasBuddy before filling up | Every fill-up | $0.10 – $0.40/gallon |
| Use warehouse club gas station | Every fill-up (if membership) | $0.10 – $0.25/gallon |
| Redeem grocery fuel rewards | Monthly | $0.10 – $0.50/gallon |
| Use cashback app (Upside) | Every fill-up | $0.05 – $0.25/gallon |
| Drive smoothly and at speed limit | Daily | 10 – 20% better MPG |
| Check tire pressure | Monthly | 1 – 3% better MPG |
| Combine errands | Weekly | 1 – 3 fewer trips/month |
Applied consistently, these habits combined can reduce your annual gas spending by 20-35% — without buying a different car, changing where you work, or making any dramatic lifestyle change.
For a household spending $200/month on gas, that’s $480-840 back per year. From habits most of which take less than a minute each.
Combined with the broader transport savings we’ll cover in our upcoming guides on car insurance and car maintenance, your total transport costs have significant room to move — and gas is where the weekly, immediately visible savings start.
What’s your go-to strategy for saving on gas? Drop it in the comments — I’m always looking for approaches I haven’t tried yet!
