Flex Fuel Vehicles: Every Car That Takes E85
109 factory flex fuel models · 17 brands · model years 1996–2026
Is my car flex fuel?
Pick your make and model to see whether a factory flex fuel version was built, which years, and which engines can take E85.
Covers factory-built U.S. flex fuel vehicles. Flex fuel capability depends on the exact engine, so always confirm with the fuel-door label or a VIN lookup before filling up with E85.
A flex fuel vehicle (FFV) is a car, truck, or SUV engineered to run on any blend of gasoline and ethanol up to E85 — a fuel containing 51–83% ethanol depending on season and region. Unlike a dedicated ethanol car, an FFV uses a single tank and an onboard fuel composition sensor that lets the engine computer adjust injection timing and spark on the fly. You can fill up with regular gasoline, E85, or any mix of the two, and the vehicle simply adapts.
Flex Fuel Vehicles by Type
Shopping by body style? Start with the full list for each type.
Figuring out whether your car qualifies is easier than most drivers think. The three fastest checks are the yellow gas cap (industry standard for most FFVs from model year 2008 onward, and from 2006 on General Motors vehicles), a label inside the fuel filler door that reads "E85/Gasoline" or "FlexFuel," and the owner's manual fuel requirements section. If those are missing or ambiguous, the 8th digit of your 17-character VIN encodes the engine and fuel type, and a free lookup at the NHTSA vPIC decoder will return a "Flexible Fuel Vehicle" designation when present.
Confirming flex-fuel capability matters for two practical reasons. First, E85 averaged about $0.50 per gallon less than regular gasoline nationally in late 2025, with the gap reaching nearly $1.00 on the West Coast. Second, the U.S. now has more than 4,750 public E85 stations across 44 states, concentrated in the Midwest but expanding rapidly. Use our state-by-state coverage to see what's available where you drive.
Flex-Fuel Vehicles by Brand
17 manufacturers and brand groups have built factory FFVs for the U.S. market. Click any brand for the complete model list, year ranges, engine codes, and brand-specific E85 tips.
How to confirm your vehicle is flex-fuel
Every confirmation method below is free and takes less than five minutes. Use them in combination when a single signal is ambiguous — badging has been inconsistent across brands, and a missing yellow cap doesn't always mean the car isn't an FFV.
1. Check the gas cap first
From model year 2008 forward (2006 for GM), nearly every U.S. FFV shipped with a bright yellow fuel cap stamped "E85/Gasoline" or "FlexFuel." Vehicles with capless filler systems use a yellow ring around the filler neck opening. This is the fastest visual check, but not universal: some Ford trucks shipped with branded black caps despite being flex-fuel, and some 1998–2005 FFVs predate the yellow-cap convention entirely.
2. Open the fuel door and look inside
Manufacturers place a decal on the inner side of the fuel door listing approved fuels. Common language includes "E85/Gasoline," "FlexFuel," "Unleaded Gasoline or E-85 Only," and — on Mercedes-Benz FFVs specifically — "Premium Gasoline (min 91 Octane) or E85 Only." If the label says only "Unleaded Gasoline" or specifies "do not use E85," the vehicle is not an FFV.
3. Look for exterior badging
Ford used "FFV" badges; GM used "FlexFuel" with a green leaf emblem; Chrysler, Dodge, and Jeep used a silver or green "FlexFuel E85" tag on the rear trunk or tailgate. Badging is suggestive but not definitive — many fleet FFVs were delivered without exterior emblems.
4. Read the owner's manual fuel requirements section
This is the authoritative written source. It will explicitly approve E85, describe the fuel composition sensor, and list any special maintenance the vehicle needs when running ethanol — such as halved oil-change intervals on Toyota Tundra/Sequoia FFVs, or more frequent filter changes on some Nissan Titans.
5. Decode the VIN
The 8th digit of your 17-character VIN identifies the engine and its fuel compatibility. Common FFV engine codes include V, K, L, or 2 on Ford products; 0, 3, C, D, K, L, M, U, or Z on GM products; and P, T, G, or K on Chrysler/Dodge/Jeep vehicles. Paste your VIN into the free NHTSA vPIC decoder — if the vehicle is an FFV, the "Fuel Type" field returns "Flexible Fuel Vehicle (FFV)" or "E85." The tool works for every U.S. vehicle from 1981 forward.
6. Call the manufacturer as a final check
Ford, GM, Chrysler, Toyota, Nissan, and Mercedes-Benz all maintain customer-assistance lines that will pull a build sheet from your VIN and confirm fuel-system configuration. Dealers can do the same through their parts/service portal. Use this step if the other signals conflict.
Frequently asked questions
What does flex fuel mean?
Flex fuel means the vehicle can run on gasoline, on E85 (a blend of 51–83% ethanol), or on any mixture of the two from the same tank. A sensor measures how much ethanol is in the fuel and the engine computer adjusts automatically — the driver does nothing. "Flex fuel" also gets used as a name for E85 itself, which is why E85 pumps are often labeled Flex Fuel.
Can I put regular gas in a flex-fuel vehicle?
Yes. An FFV is designed to run on any mix of gasoline and ethanol from 0% to 85% ethanol, and the fuel composition sensor automatically adjusts injection and timing to whatever is in the tank. Fill with regular 87-octane gasoline whenever E85 is unavailable or uneconomical — the vehicle will not throw codes, lose performance, or require a "reset." Many FFV owners switch back and forth every tank without issue.
What happens if I accidentally put E85 in a non-flex-fuel car?
One tank in a modern (2001 or newer) gasoline vehicle is rarely catastrophic. You may see a check engine light, rough idle, hard starting, or brief loss of power as the engine runs lean. The condition usually clears once the tank is diluted with two or three fill-ups of regular gasoline. The real risk is repeated use or older vehicles: ethanol's solvent properties can degrade rubber fuel lines, pump diaphragms, gaskets, and injector seals that were not built for ethanol exposure. For carbureted or pre-2001 vehicles, one bad tank can cause lasting fuel-system damage.
Is E85 available everywhere?
No, but coverage is broad. AFDC currently lists more than 4,750 public E85 stations across 44 states, with the densest networks in California, Minnesota, Illinois, Iowa, Ohio, Michigan, Texas, Indiana, and Wisconsin. A handful of states — mostly in New England, plus Alaska and Hawaii — have few or no public E85 pumps. Check the station map before a trip, especially through the Northeast, Pacific Northwest, or Mountain West.
Will E85 hurt my fuel economy?
Yes — expect roughly 15% to 27% fewer miles per gallon on E85 versus gasoline, per EPA data. Ethanol contains about 30% less energy per gallon than gasoline, so the engine burns more of it to make the same power. Whether E85 saves money depends on the pump price: as a rule, E85 needs to be at least 20–25% cheaper per gallon than regular gas to break even on cost per mile. When the discount is smaller, E85 costs slightly more to drive on, though many owners still use it for its higher octane and cleaner combustion.
Does using E85 void my warranty?
In an FFV, no — E85 is the fuel the vehicle is explicitly built to burn, and running it is fully covered. In a non-FFV, using E85 or any ethanol blend above what the owner's manual permits (typically E10, sometimes E15 on 2012-and-newer vehicles) can give the manufacturer grounds to deny warranty claims for fuel-system or engine damage. Stick to the fuel listed on your fuel-door label.
Find E85 Near You
Once you've confirmed FFV status, use the live map to find the closest E85 station.
Open E85 locator →Best E85 Vehicles of 2026
Our 2026 buyer's guide — best used-FFV trucks, SUVs, and sedans, plus cost-per-mile math.
Read the guide →