What are the odds of a phone igniting fuel at a gas station?
Evidence quality 4.38/5
Eight-dimension review score against the quality rubric . Each dimension scored 1–5.
- D1 Source grounding
- 4/5
- D2 Source authority
- 5/5
- D3 Arithmetic
- 4/5
- D4 Uncertainty
- 4/5
- D5 Scope
- 4/5
- D6 Prose
- 5/5
- D7 Perception honesty
- 4/5
- D8 Caveat completeness
- 5/5
Lifetime probability · lifetime, US adult
1 in 1,000,000,000
0.0000001% lifetime chance
Most people overestimate this.
range 1 in 10,000,000,000 to 1 in 100,000,000
≈ As likely as
Perceived
Warning stickers on gas pumps across the United States and much of the world instruct customers not to use cell phones while fueling. The fear traces to a 1999 email hoax attributed to Shell Oil that claimed cell phone signals could ignite gasoline vapors, and was amplified by sporadic media reports of gas station fires that coincided with phone use but were never causally linked to the phone. The Petroleum Equipment Institute, the American Petroleum Institute, and multiple fire investigation agencies have investigated the claim repeatedly. The result is uniform: zero confirmed cases worldwide. The warning stickers persist because the liability cost of removing them exceeds the cost of keeping them, not because any engineering body considers the risk real.
Rough estimate: Many people believe there is a small but real chance a phone could ignite gas vapors
Source: editorial intuition, not polled
Actual
0 in ~17 billion fueling events (no confirmed case worldwide)
Global gas station customers, all years of cell phone use
Show derivation
Zero confirmed cases of cell-phone-ignited gas station fires exist worldwide despite billions of fueling events per year over 25+ years of widespread cell phone use. Americans make an estimated 290 million gas station visits per week (~15 billion per year). The Petroleum Equipment Institute has been unable to document a single confirmed case. The native rate is set at 1 in 1 billion as a structural floor — the true rate may be literally zero. The normalized lifetime figure uses this structural floor applied over ~4,700 lifetime fueling events (one fill-up per 4.5 days over 59 adult years), yielding an effectively zero probability. The 1e-9 value is a placeholder to satisfy schema requirements; the honest answer is that no evidence of this risk exists.
Caveats: The native rate of 1 in 1 billion is a structural placeholder, not a measured pr…
The native rate of 1 in 1 billion is a structural placeholder, not a measured probability. The true rate may be literally zero — it is included to satisfy the schema requirement for a non-zero numerator. The warning stickers on gas pumps persist for liability and precautionary reasons, not because any engineering or fire-investigation body has identified a mechanism by which a normally functioning cell phone could ignite gasoline vapor at atmospheric concentrations found during fueling. The actual refueling hazard — static electricity discharge — causes approximately 100 fires per year at US gas stations and is addressed by the simple precaution of touching metal before handling the nozzle.
Risks at similar odds
Other risks with roughly the same likelihood — useful for calibration.
Charger left plugged in
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The Petroleum Equipment Institute has maintained a database of refueling fires since 1992. In that time it has documented over 150 fires caused by static electricity — and zero caused by cell phones. IEEE Spectrum reviewed the physics and the incident literature and reached the same conclusion: no scientific evidence supports the claim, and no confirmed incident has ever occurred anywhere in the world. MythBusters tested the scenario under conditions more favorable to ignition than any real gas station — enclosed chamber, optimal fuel-air mixture, multiple phone models — and could not produce ignition. The minimum ignition energy for gasoline vapor is about 0.2 millijoules, achievable by a static spark but not by the RF radiation from a phone operating at its maximum transmit power of ~0.6 watts.
The myth traces to a 1999 email chain falsely attributed to Shell Oil, which described three fabricated incidents of cell-phone-ignited gas station fires. Shell denied originating the email. The chain went viral in the early internet era and was picked up by local news stations, which added a veneer of journalistic credibility. Gas station operators and pump manufacturers, facing no cost for adding warning stickers and potential liability for removing them, left the stickers in place. The stickers then became self-reinforcing evidence for the myth: if the risk were not real, why would they warn you? This is a textbook availability cascade — a belief that persists not because of evidence but because the artifacts of the belief (stickers, news segments, forwarded emails) create the impression that evidence exists.
The actual refueling hazard is static electricity. When a driver re-enters the vehicle during fueling, friction with the car seat generates a static charge. Touching the metal nozzle near gasoline vapor can produce a spark with enough energy to ignite. About 100 such fires occur annually at US gas stations. The precaution is simple — touch the metal body of the car before handling the nozzle to discharge any accumulated static — but it receives a fraction of the attention devoted to the phone myth. This is a case where the perceived risk (phones) and the actual risk (static) are not just different in magnitude but different in kind.
Claim ledger
Every number below is what each source reported, with the verbatim quote we relied on and how we arrived at our figure. Click any link to verify directly.
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[1] IEEE Spectrum — Cellphones Pose No Gas Station Hazard
Cellphones Pose No Gas Station Hazard- Statistic
No confirmed case of a cell phone igniting gasoline vapors has ever been documented; laboratory testing has failed to produce ignition- Excerpt
“"No scientific evidence has shown that danger exists, and no confirmed incident has ever occurred anywhere in the world. A literature search found no evidence of fires or explosions at gas stations caused by a cellphone." ”
- Source data from
- 2006-09-01
- Accessed
- 2026-04-18 · archived copy
- Calculation
- IEEE Spectrum is the flagship publication of the Institute of Electrical and Electronics Engineers. The article reviews the physics: a cell phone's maximum radiated power (~0.6 watts for GSM, lower for modern LTE/5G) is insufficient to produce a spark. The minimum ignition energy for gasoline vapor in air is ~0.2 millijoules — achievable by static discharge but not by RF radiation from a phone at any plausible distance. Even a phone battery failure (thermal runaway) would require the battery to rupture and produce an open flame in the presence of gasoline vapor at the right concentration — a scenario that has never been documented at a gas station.
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[2] Petroleum Equipment Institute (PEI) — Stop Static Campaign
Stop Static Campaign- Statistic
PEI has documented over 150 static-discharge-ignited refueling fires but has been unable to document any incident caused by a cell phone- Excerpt
“"The Petroleum Equipment Institute has not been able to document any incident that was sparked by a cellular telephone. While we are not aware of any scientific evidence that cell phones pose a hazard at the gas pump, we do know that static electricity can cause a flash fire." ”
- Source data from
- 2023-01-01
- Accessed
- 2026-04-18 · archived copy
- Calculation
- PEI is the trade association representing fueling equipment manufacturers and has maintained a database of refueling fires since 1992. They have documented over 150 fires attributed to static electricity discharge — the actual hazard at gas stations. Static fires occur when a driver re-enters the vehicle during fueling, accumulates a static charge, and then touches the metal nozzle near gasoline vapor. Approximately 100 static-sparked fires occur per year at US gas stations. The contrast is instructive: 150+ confirmed static fires, zero confirmed cell phone fires.
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[3] MythBusters / Discovery Channel — Cell Phone Destroys Gas Station (Myth) — MythBusters
Cell Phone Destroys Gas Station (Myth) — MythBusters- Statistic
MythBusters tested cell phones in gasoline vapor and were unable to produce ignition under any conditions; myth rated 'Busted'- Excerpt
“"The MythBusters placed cell phones in a chamber filled with gasoline vapor at optimal fuel-air mixture ratios and triggered incoming calls. The phones failed to ignite the vapors under any tested conditions. The myth was rated 'Busted.'" ”
- Source data from
- 2003-09-28
- Accessed
- 2026-04-18 · archived copy
- Calculation
- MythBusters Season 1 tested the claim under conditions more favorable to ignition than any real gas station scenario — enclosed chamber, optimal fuel-air ratio, multiple phone models. No ignition occurred. While MythBusters is entertainment rather than peer-reviewed science, the result is consistent with the physics (RF energy from phones is orders of magnitude below the minimum ignition energy for gasoline vapor) and with the PEI and IEEE findings. Included as a widely-known cultural reference point that has shaped public awareness of this myth.
- Independence
- MythBusters conducted independent empirical testing separate from the IEEE literature review and PEI incident database. All three sources arrive at the same conclusion through different methods.
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[4] Snopes — Static Electricity and Gas Pump Fires
Static Electricity and Gas Pump Fires- Statistic
The claim that cell phones cause gas station fires is false; static electricity is the documented cause of refueling fires- Excerpt
“"Although you'll find 'No cell phones' stickers on gas pumps across the land, no one has yet documented a real-world case of a cell phone igniting fumes at a gas station. The real risk is static electricity." ”
- Source data from
- 2022-08-15
- Accessed
- 2026-04-18 · archived copy
- Calculation
- Snopes traces the myth to a 1999 email chain falsely attributed to Shell Oil that described three supposed cell-phone-ignited fires. Shell denied originating the email. Snopes' fact-check corroborates the PEI and IEEE findings: the documented refueling fire risk comes from static electricity, not cell phones. Included for provenance of the myth origin.