Local Gas Prices in Rotor Rate: Where the Number Comes From and Why It Might Not Match the Pump

# Local Gas Prices in Rotor Rate: Where the Number Comes From and Why It Might Not Match the Pump

Open the Rotor Rate calculator, type in a job address, and the Local Gas Price research tile fills itself in. Most pilots glance at it (it's under the main calculator body), nod, and move on. Once in a while someone notices the number is 18 cents off from what they paid yesterday and (rightly) wants to know what's going on. Don't worry, nothing is amiss...

Short version: the price is real, it's official, and it's a regional weekly average — not a snapshot of your nearest pump. That distinction matters for how you should use it.

What you'll walk away with

• A clear(er) picture of which federal dataset feeds the tile and how often it updates.
• Five legitimate reasons your local pump won't match the auto-filled number.
• A simple rule for when to accept the auto-filled price and when to override.
• Where to cross-check pump prices if you need a same-day, station-level number (if ever).

Where the number comes from

The auto-filled price is pulled straight from the U.S. Energy Information Administration (EIA), the federal agency that publishes the country's official energy statistics. I'm sure it's a very exciting office to work in. Anyway, we use their Weekly Retail Gasoline Prices dataset — regular grade, all formulations — for the PADD region your job address falls in.

PADD stands for "Petroleum Administration for Defense District," a five-region map of the U.S. the federal government has used for fuel logistics since World War II:

• PADD 1 — East Coast (CT, FL, GA, NY, PA, the Carolinas, etc.)
• PADD 2 — Midwest (IL, OH, MI, MO, TX-adjacent plains)
• PADD 3 — Gulf Coast (TX, LA, AL, MS, NM, AR)
• PADD 4 — Rocky Mountain (CO, ID, MT, UT, WY)
• PADD 5 — West Coast (CA, OR, WA, NV, AZ, AK, HI)

This is very exciting stuff folks! Crickets...

When you enter a job address, Rotor Rate extracts the state, maps it to its PADD, and pulls that region's most recent weekly price.

How often it updates

The EIA publishes a single price every Monday around 5:00 PM Eastern, covering the prior week. So:

• Cadence: weekly, not daily.
• Value: an average across hundreds of retail outlets in the region.
• Lag: at most about 7 days behind real-time pump prices.
• Server cache: we additionally cache the response for 6 hours per region to keep the EIA API happy. Refreshing the page won't pull a "newer" number until that cache expires and a new weekly value has been published.

Why it won't exactly match your local station

Here's a few reasons:

1. It's a regional average. PADD 5 includes both Los Angeles and Anchorage. A weekly mean across that geography will land somewhere between the two — and never exactly on either.
2. Grade and formulation. EIA's headline figure is regular, all formulations. If your vehicle runs on premium, or you're in a reformulated-gasoline market (California summer blend, Chicago reformulated, etc.), your pump price will skew higher.
3. State and local taxes. EIA's regional number bakes in an average of state taxes. California's $0.60/gal tax pulls the PADD 5 average above the actual Nevada or Arizona pump.
4. Brand and station premiums. Major-brand stations (Chevron, Shell) typically price above the regional average; warehouse-club and off-brand stations (Costco, Sam's Club) typically price below. EIA's sample doesn't favor either.
5. Day-of-week swing. Pump prices often move noticeably through the week. The weekly average smooths that out.

In practice, the auto-filled number is usually within a quarter of your actual pump — close enough to bid confidently, occasionally worth overriding.

When you should override it

Click the pencil icon on the Local Gas Price tile and type what you actually pay. Good reasons to override:

• You always fuel at a known-cheap (or known-expensive) station and want your real cost reflected.
• You run premium or diesel in your vehicle.
• You're in a state where the pump has visibly diverged from the regional average (CA after a refinery outage, the Mountain West during a holiday weekend, anywhere right after a hurricane).
• You're bidding a multi-stop chain and want to be conservative on the fuel line.

The override is per-state, sticky across sessions, and — importantly — gets stamped onto each completed mission as `gas_price_override`. That means when you look at a job six months from now, the fuel cost you used to bid it is preserved exactly, even if today's regional EIA number has moved.

A 5-step methodology for using the tile in a quote

1. Glance at the auto-filled number. If it's within ~$0.25 of what you actually pay, leave it.
2. Compare it against the AAA Gas Prices state or metro page for a 30-second sanity check. If AAA's state average and EIA's PADD average disagree by more than $0.30, your state is probably an outlier inside its PADD — override toward AAA.
3. Override with your real fueling cost when (a) you fuel at a consistent low/high-priced station, (b) you run premium or diesel, or (c) pump prices in your area moved >10% in the last week.
4. Save the job so the override is locked onto that mission record — protecting your historical profitability data.
5. Re-check quarterly. If the trailing 12-month average in your area has shifted more than 15%, revisit your planning default and the travel rate (if you charge one). See How Gas Price Swings Quietly Reshape Your Drone Pay .

Pitfalls

• Trusting the auto-filled number on a same-day fillup. Weekly averages lag real life. For a job you'll fuel up for in the next 24 hours, override with the current pump price.
• Forgetting hybrid/EV math. If your vehicle is a plug-in hybrid or full Electric Vehicle (EV), this tile underestimates or overestimates your true cost. Use the override to encode kWh-equivalent cost, or zero it out for full EVs (and let the IRS standard mileage rate — $0.725/mi — carry the deduction logic instead).
• Ignoring the long-haul effect. On a 30-mile real estate job, a $0.50 swing is rounding error. On a 220-mile inspection it's the difference between a green-light verdict and a thin-margin one. See How Gas Price Swings Quietly Reshape Your Drone Pay for worked examples.
• Overriding once and forgetting. Local prices move. If you set a $4.10 override in May and it's still pinned in September, you may be padding bids you don't need to (or eating a loss you didn't see coming).

Why we use EIA instead of a "live" pump-price API

A reasonable question. The honest tradeoffs:

• Coverage. EIA covers every U.S. state, every week, indefinitely. Consumer pump-price APIs (GasBuddy, etc.) are gated, paid, and rate-limited.
• Stability. EIA's number doesn't whipsaw on a single station's bad price feed.
• Authoritativeness. It's the same dataset banks, freight companies, and the federal government use to model fuel costs. Defensible if a client ever asks where the number came from.
• Cost. EIA is free and public — meaning we can offer the lookup on the free /calculator route without making logged-in users subsidize anonymous traffic.

The tradeoff we accept is the weekly granularity. For bidding, that's the right tradeoff. If you need the exact pump price for a same-day fillup, that's what the override is for.

How it flows into the rest of your bid

Once the price is set (auto-filled or overridden), it feeds the fuel-cost line on your bid via:

• Distance — entered as either one-way or round-trip miles (using the segmented toggle) and pulled from the Google Maps panel.
• Vehicle MPG — from your Rate Settings.
• Gas price per gallon — the EIA number or your override.

Add them together by dividing the total round-trip distance by your MPG and multiplying by the price per gallon. Every variable is editable, and every override is preserved with the saved job for an honest historical record. The free Rotor Rate calculator does this in one screen; the paid version then locks the value onto each saved mission so your year-end profitability picture stays honest even after pump prices move.

Resources & further reading

Primary sources

• U.S. EIA — Weekly Retail Gasoline and Diesel Prices — the dataset behind the tile.
• EIA — PADD map and definitions
• EIA Open Data API — series identifiers used in Rotor Rate's lookup.
• IRS Standard Mileage Rates — $0.725/mi for 2026.

Cross-check tools (pump-level)

• AAA Gas Prices — state and metro averages, updated daily.
• GasBuddy — crowdsourced station-level pricing.

Training

• FAA Safety Team (FAASTeam) WINGS Pilot Proficiency Program — recurrent training including cost-of-operation modules.

Related Rotor Rate articles

• How Gas Price Swings Quietly Reshape Your Drone Pay
• Drive Time, Mileage, and Margin
• Drone Mission Chaining
• The Mileage Deduction

Bottom line

The fuel-price tile is a sanity check, not a stopwatch. It pulls the official weekly regional average from EIA so your bids start from a defensible number, and it gets out of your way the moment you know your real cost better than the federal average does. Glance, sanity-check, override if needed, save the job — and you've captured fuel cost honestly without spending five minutes hunting a price.