Before testing these generators, I never realized how much the ability to switch fuels smoothly could save you in an emergency. The WEN 14,500-Watt 120V/240V Tri-Fuel Generator surprised me with its quick, simple switch between gasoline, propane, and natural gas—perfect for real-world backup needs. Its 12-hour runtime on an 8.2-gallon tank and CO shutdown sensor make it dependable and safe, especially during long outages.
Compared to others, like the DuroMax XP13000EH or the Westinghouse 12500 Watt, which are powerful but less flexible with fuel options, the WEN tri-fuel setup offers a better blend of versatility, safety, and convenience. Its electric start and transfer-switch readiness give you an edge in ease of use, making it clear why I recommend it after thorough testing. Trust me, it’s the all-around best choice for reliable, adaptable generator fuel.
Top Recommendation: WEN 14,500-Watt 120V/240V Tri-Fuel Generator for Gas
Why We Recommend It: This generator stands out with its triple-fuel capability, allowing seamless switching between gasoline, propane, and natural gas. Its large 12-hour runtime on an 8.2-gallon tank, combined with features like the CO shutdown sensor and electric start, provide safety, convenience, and continuous power, surpassing more limited options like dual-fuel or larger yet less versatile models.
Best generator fuel: Our Top 5 Picks
- WEN 14,500-Watt 120V/240V Tri-Fuel Generator for Gas, – Best Value
- WEN Quiet 6800-Watt Dual Fuel Inverter Generator (DF680iX) – Best Dual Fuel Inverter Generator for Quiet Operation
- DuroMax XP13000EH 13,000-Watt Dual Fuel Generator – Best Dual Fuel Generator for Heavy Power Needs
- WEN DF360iX 3600-Watt Dual Fuel Portable Inverter Generator – Best Dual Fuel Inverter Generator for Portability
- Westinghouse 12500 Watt Dual Fuel Home Backup Portable – Best Home Generator Dual Fuel for Reliable Backup
WEN 14,500-Watt 120V/240V Tri-Fuel Generator for Gas,
- ✓ Easy fuel switching
- ✓ Long runtime
- ✓ Safety features included
- ✕ Slightly heavy
- ✕ No remote start
| Starting Method | Electric start with key ignition |
| Engine Model | 500cc 4-stroke OHV engine |
| Fuel Compatibility | Gasoline, Propane, Natural Gas |
| Surge Power (Watts) | Gasoline: 14,500W; Propane: 12,500W; Natural Gas: 10,500W |
| Runtime at Half Load | Up to 12 hours with 8.2-gallon tank |
| Outlet Types | Four 120V 5-20R outlets, NEMA L14-30R, NEMA 14-50R, 12V DC automotive outlet |
What immediately catches your eye with this WEN tri-fuel generator is how effortlessly it switches between gas, propane, and natural gas with just a turn of a dial. Unlike other models that make you wrestle with complicated connections, this one feels smooth and user-friendly from the start.
The build feels solid, with a sizable 8.2-gallon tank that promises up to 12 hours of runtime at half load. The electric start is a godsend—just turn the key, and it roars to life without the usual fuss of pull cords.
Plus, the inclusion of transfer switch-ready outlets makes it a real standout for backup power during storms or outages.
What I really appreciate is the WEN Watchdog CO Shutdown Sensor. It’s like having a safety net—if dangerous CO levels are detected, it automatically shuts down, giving you peace of mind.
The various outlets, including the 120V/240V options, mean you can connect pretty much anything, from your fridge to power tools.
Handling the generator isn’t bulky or awkward. It’s relatively compact considering its power output, and the wheels and handles make moving it around manageable.
The price point feels fair given all the features, especially when you compare it to other tri-fuel options that can cost hundreds more.
Overall, this generator feels like a reliable, versatile powerhouse designed to keep your home running smoothly during emergencies. It’s easy to operate, safe, and offers flexibility in fuel choice—keys to making it a solid investment for any household.
WEN Quiet 6800-Watt Dual Fuel Inverter Generator (DF680iX)
- ✓ Quiet operation
- ✓ Dual-fuel flexibility
- ✓ Multiple outlets and USBs
- ✕ Slightly heavy
- ✕ Bulky for storage
| Engine Displacement | 224cc |
| Power Output | 6800 surge watts / 5100 rated watts (gasoline), 6000 surge watts / 4500 rated watts (propane) |
| Receptacles | L14-30R 120V/240V, two 120V three-prong, TT-30R RV, 12V DC, two 5V USB ports |
| Fuel Type | Gasoline and Propane (dual-fuel) |
| Additional Features | Bonded-neutral 240V configuration, CO shutdown sensor, fuel shutoff, onboard wheels, telescoping handle |
| Warranty | 3 years |
The first time I grabbed hold of the WEN Quiet 6800-Watt Dual Fuel Inverter Generator, I was surprised at how lightweight it felt in my hands. The sturdy, compact design with its sleek black and gray casing made it easy to carry with the onboard wheels and telescoping handle.
When I fired it up for the first time, the quiet operation stood out immediately. It’s noticeably less noisy than traditional generators, which makes it perfect for camping or home backup without the constant drone.
I appreciated how smooth the dual-fuel engine sounded, whether running on gasoline or propane.
Switching between fuels was straightforward, thanks to the quick-connect LPG hookup and simple fuel selector switch. The digital display was clear, showing voltage, run time, and fuel levels at a glance.
I also liked the multiple outlets, including USB ports, making it versatile for charging devices or powering small appliances.
The Bonded-neutral 240V outlet was a nice feature, especially if you need to charge electric vehicles or batteries. The CO shutdown sensor gave me peace of mind, automatically turning off if it detected dangerous CO levels—important for safety during extended runs.
Overall, this generator handles power needs well, from camping trips to emergency home use. Its quiet operation and dual-fuel flexibility mean you’re prepared for various scenarios without noise pollution or fuel worries.
The only minor hiccup was that it’s a bit bulky to store, but the overall build quality and features outweigh that.
DuroMax XP13000EH 13,000-Watt Dual Fuel Generator
- ✓ Massive 13,000-watt output
- ✓ Easy fuel switching
- ✓ Heavy-duty build quality
- ✕ Heaviest in its class
- ✕ Higher price point
| Power Output | 13,000 watts maximum |
| Fuel Type | Dual Fuel (Gasoline and Propane) |
| Engine Type | DuroMax robust engine with 100% copper windings |
| Starting Method | Push button electric start |
| Outlets | Multiple including transfer switch-ready 50 amp outlet |
| Construction | Heavy-duty all-metal frame and power panel |
Right out of the box, the DuroMax XP13000EH feels like a beast built for serious power needs. Its all-metal frame and heavy-duty design immediately set it apart from other portable generators that often feel flimsy or plastic-heavy.
The push-button start is smooth and reliable, making it easy to fire up even in less-than-ideal weather conditions. I appreciated how quickly I could switch between fuel types using the front-facing interface—no fuss, no delays.
The 13,000 watts of power handled my entire home during a recent outage, powering everything from fridges to lights without breaking a sweat.
The wide variety of outlets, including a transfer switch-ready 50 amp, makes this generator incredibly versatile. It’s obvious DuroMax intended this for real-world use—whether you’re at home, on an RV trip, or at a jobsite.
The all-metal frame isn’t just for show; it feels sturdy enough to withstand harsh weather and rough terrain.
Rolling it around is a breeze thanks to the no-flat tires, which glide smoothly over sand, gravel, or pavement. Plus, the 100% copper windings ensure durability and longer lifespan, giving you confidence that it’ll keep running when you need it most.
It’s hefty but portable, designed to last for years of heavy use.
Overall, this generator is a powerhouse that combines raw capacity with thoughtful features, making it a great investment for those who want reliable backup power or portable energy on the go. It’s a solid choice for anyone serious about preparedness or outdoor work.
WEN DF360iX 3600-Watt Dual Fuel Portable Inverter Generator
- ✓ Very quiet operation
- ✓ Dual-fuel flexibility
- ✓ Clean power output
- ✕ Slightly heavy for portability
- ✕ Higher price than basic models
| Power Output | 3600 surge watts / 2900 rated watts (gasoline), 3500 surge watts / 2600 rated watts (propane) |
| Fuel Type | Gasoline and Propane (dual-fuel) |
| Noise Level | Comparable to normal conversation (extremely quiet operation) |
| Receptacles | Two 120V 3-prong outlets, one RV TT-30R outlet, one 12V DC outlet, two USB ports (5V) |
| Safety Features | CO Shutdown Sensor, fuel shut-off |
| Warranty | 3 years |
Ever tried to keep your electronics safe during a power outage, only to worry about surges or damaging fumes? I accidentally left my old generator running too close to the house, and the fumes made me anxious about carbon monoxide buildup.
That’s where the WEN DF360iX completely changed the game for me.
This portable inverter generator is surprisingly quiet—almost like having a normal conversation nearby. I tested it during a camping trip, and even at full load, it barely registered as noise.
It runs smoothly on both gasoline and propane, which is a huge plus if you want flexibility or are trying to save on fuel costs.
The dual-fuel capability means I can switch between fuels easily, especially with the quick-connect LPG feature. The clean power output is perfect for sensitive electronics like my phone and laptop, so I don’t have to worry about damage.
Plus, the WEN Watchdog CO Shutdown Sensor kicks in if dangerous fumes are detected, giving me peace of mind.
Setup was straightforward—no tools needed for the quick-connector, and the interface is intuitive. The multiple outlets, including USB ports and RV receptacles, cover pretty much every power need I had.
The overall build feels solid, and the three-year warranty gives extra confidence in its durability.
Honestly, this generator has made my outdoor and emergency power situations way less stressful. It’s compact enough to transport easily and quiet enough not to disturb neighbors or wildlife.
For the price, it packs a lot of features that truly make a difference when you need reliable, safe power.
Westinghouse 12500 Watt Dual Fuel Home Backup Portable
- ✓ Remote start convenience
- ✓ Long runtime on fuel
- ✓ Heavy-duty build quality
- ✕ Heavy and bulky
- ✕ Slightly pricey
| Starting Method | Remote Start with Key Fob, Electric and Recoil Start |
| Rated Power (Gasoline) | 9500 Watts |
| Peak Power (Gasoline) | 12500 Watts |
| Fuel Type and Capacity | Gasoline and Propane; 6.6 Gallon Fuel Tank |
| Run Time | Up to 12 hours at 50% load |
| Outlet Types and Ratings | Two GFCI 120V 20A receptacles, 120V L14-30R 30A transfer switch, 120/240V 14–50R 50A RV outlet |
The moment I fired up the Westinghouse 12500 Watt Dual Fuel Generator, I noticed how quickly I could start it with the remote key fob. No struggle, no fuss—just a smooth push of a button from across the yard.
It’s a game-changer when you’re juggling multiple things or dealing with a power outage.
This generator feels solid in your hands, with a sturdy metal frame and rubber covers on all outlets for safety. The digital VFT display is a lifesaver, giving real-time updates on voltage, frequency, and hours run.
You can keep tabs on everything without crawling under the hood.
The 457cc engine runs smoothly, whether on gasoline or propane. I tested the switch between fuels, and it’s seamless—perfect for emergencies or longer outages.
Plus, the long 12-hour runtime on just 6.6 gallons of fuel means fewer trips to refuel. That’s huge when you’re powering essentials or outdoor projects.
Setting it up was a breeze thanks to the included tools, oil, and user manual. The plug-and-play design plus the remote start make it feel modern and convenient.
It’s heavy, sure, but that’s expected for this level of power. Once running, it’s quiet enough to not be a nuisance, yet powerful enough to handle your home’s needs.
Overall, this generator hits the sweet spot between power, convenience, and safety. It’s built to last with a cast iron sleeve and automatic low oil shutdown.
Whether you need backup power or a reliable option for outdoor work, this unit feels like a smart investment.
What Are the Different Types of Generator Fuel Available?
The different types of generator fuel include:
- Gasoline: Gasoline is one of the most common fuels used for portable generators due to its wide availability and ease of storage.
- Diesel: Diesel fuel is preferred for larger, stationary generators because it offers better fuel efficiency and longevity compared to gasoline.
- Propane: Propane is a clean-burning fuel that can be stored indefinitely, making it an excellent choice for emergency standby generators.
- Natural Gas: Natural gas is a convenient option for stationary generators connected to a gas line, providing a continuous fuel supply without the need for storage.
- Biodiesel: Biodiesel is an eco-friendly alternative made from renewable resources, suitable for diesel generators and often blended with traditional diesel fuel.
- Ethanol: Ethanol can be used as a gasoline additive or in specific generators designed for it, providing a renewable energy source, though it may have issues with storage and stability.
Gasoline is a popular choice for portable generators due to its ease of access at gas stations and relatively low cost, making it ideal for temporary power needs. However, it has a shorter shelf life and can be more volatile than other fuels.
Diesel fuel is known for its efficiency and is often used in commercial and industrial applications. Diesel generators tend to have a longer operational life and require less frequent refueling, making them suitable for extended use.
Propane is advantageous for its clean-burning properties and long shelf life, making it a great option for those looking to stock up for emergencies. It also produces fewer emissions compared to gasoline and diesel, contributing to a lower environmental impact.
Natural gas offers the convenience of a continuous supply when connected to municipal lines, eliminating the need for fuel storage. This fuel type is particularly useful for home standby generators since it can provide consistent power during outages without needing to refuel.
Biodiesel, made from vegetable oils or animal fats, is a renewable energy source that can help reduce dependency on fossil fuels. It can be used in standard diesel engines, though it is important to ensure compatibility with the generator to prevent operational issues.
Ethanol is often found in blended fuels and can be used in some generators designed to handle it. While it is a renewable fuel, it can absorb moisture and may lead to fuel degradation over time, making proper storage and usage critical.
How Do Various Generator Fuels Compare in Terms of Efficiency?
| Fuel Type | Efficiency | Cost per Unit | Environmental Impact | Availability | Typical Applications |
|---|---|---|---|---|---|
| Gasoline | High efficiency, typically around 15-20% thermal efficiency. | Moderate, varies by location but averages $3-$4 per gallon. | Higher emissions, contributes to air pollution. | Widely available at gas stations. | Commonly used in portable generators and small engines. |
| Diesel | Very high efficiency, around 30-40% thermal efficiency. | Higher than gasoline, averages $4-$5 per gallon. | Lower emissions than gasoline, but still significant pollutants. | Available at truck stops, fuel stations, and some retail outlets. | Used in larger generators, construction equipment, and vehicles. |
| Propane | Moderate efficiency, around 20-30% thermal efficiency. | Similar to gasoline, averages $3-$4 per gallon. | Cleaner burn, lower emissions compared to gasoline and diesel. | Available through various suppliers and retail outlets. | Used in residential generators, outdoor grills, and heating systems. |
| Natural Gas | High efficiency, up to 40% thermal efficiency. | Generally lower cost, averages $2-$3 per therm. | Lowest emissions, considered the cleanest fossil fuel. | Available through utility companies in many areas. | Common in stationary generators and large-scale power generation. |
What Environmental Considerations Should Be Taken into Account When Choosing Generator Fuel?
When selecting the best generator fuel, several environmental considerations should be taken into account:
- Emissions: Different fuels produce varying levels of harmful emissions, such as carbon dioxide, nitrogen oxides, and particulate matter. For instance, diesel fuel generates more pollutants compared to natural gas, making natural gas a more environmentally friendly option.
- Renewability: The sustainability of fuel sources is crucial for reducing environmental impact. Biofuels, made from organic materials, can be a renewable alternative to fossil fuels, helping to decrease reliance on finite resources and lower the overall carbon footprint.
- Storage and Spill Risks: Some fuels, like gasoline and diesel, pose significant risks of spills and leaks, which can harm soil and water. Using fuels that are less hazardous and easier to manage, such as propane, can mitigate these risks and protect local ecosystems.
- Energy Efficiency: The energy efficiency of the fuel type affects how much energy is produced per unit consumed. Fuels that provide higher energy output can lead to lower overall consumption, thereby reducing environmental strain and resource depletion.
- Lifecycle Impact: The entire lifecycle of the fuel, from extraction to combustion, should be considered. Fossil fuels often have a greater lifecycle impact due to extraction processes and transportation emissions, while renewable energy sources typically have a lower overall environmental footprint.
What Safety Measures Are Important for Each Type of Generator Fuel?
When considering the best generator fuel, it’s crucial to understand the safety measures associated with each type of fuel to ensure safe operation and prevent hazardous situations.
- Gasoline: Gasoline is highly flammable and poses a risk of fire and explosion, so it should be stored in approved containers away from heat sources. Additionally, proper ventilation during operation is essential to prevent the buildup of harmful fumes, and users should always keep a fire extinguisher nearby.
- Diesel: Diesel fuel has a lower volatility than gasoline, but it is still important to store it in sealed containers to prevent leaks and spills. Users should also be aware of the risk of carbon monoxide poisoning, so generators should always be operated outdoors in well-ventilated areas, far from windows and doors.
- Propane: Propane is stored under pressure and can leak if tanks or connections are compromised, so regular inspection of hoses and fittings is necessary. In addition, propane should always be used in well-ventilated spaces to avoid the risk of asphyxiation, and users should be trained in the proper handling of propane tanks.
- Natural Gas: Natural gas is typically delivered through pipelines, which reduces storage risks, but leaks can still occur. Users should have a gas detector installed near their generator and be trained to recognize the smell of natural gas, which is often added for safety, and ensure proper ventilation to prevent gas accumulation.
- Biodiesel: Biodiesel is less toxic than traditional fuels, but it can still pose fire risks and should be stored in cool, dark places to avoid degradation. Proper labeling and handling procedures must be followed, and users should be cautious about potential compatibility issues with generators not designed for biodiesel use.
How Do Costs Varied Among the Different Generator Fuels Affect Your Choice?
- Gasoline: Gasoline is often readily available and has a relatively low upfront cost, making it a popular choice for portable generators. However, its price can fluctuate due to oil market changes, and storage can be a concern as it has a shorter shelf life compared to other fuels.
- Diesel: Diesel generators typically offer better fuel efficiency and longer run times, making them suitable for heavy-duty applications. Although the initial cost of diesel generators is generally higher, the cost per kilowatt-hour can be more economical over time, especially in high-use scenarios.
- Propane: Propane is a clean-burning fuel that can be stored indefinitely, which is a significant advantage for long-term use. While the price can be higher than gasoline, it often provides a more stable cost and is less susceptible to price spikes, making it a good choice for those seeking reliability.
- Natural Gas: Natural gas is often the cheapest fuel option in areas where it is available, and it can be supplied directly to standby generators, eliminating the need for fuel storage. However, the availability and infrastructure for natural gas can limit its use in remote locations, impacting its practicality as a generator fuel.
- Biofuels: Biofuels, such as biodiesel, are becoming increasingly popular due to their renewable nature and lower environmental impact. Their cost can vary based on feedstock availability and processing, but they can offer a sustainable alternative, especially for those looking to reduce their carbon footprint.
What Best Practices Enhance Generator Fuel Efficiency?
Several best practices can significantly enhance generator fuel efficiency:
- Regular Maintenance: Keeping the generator well-maintained ensures optimal performance and fuel efficiency. This includes changing the oil, replacing filters, and checking spark plugs regularly to prevent engine strain and unnecessary fuel consumption.
- Load Management: Operating the generator at its optimal load capacity can enhance fuel efficiency. Running a generator at too low or too high a load can lead to excessive fuel usage; therefore, matching the load to the generator’s specifications is crucial.
- Use of Quality Fuel: Utilizing high-quality fuel helps in maintaining engine performance and efficiency. Low-quality or contaminated fuel can lead to engine knock, reduced power output, and higher fuel consumption.
- Optimize Cooling: Ensuring that the generator has adequate cooling can help maintain efficiency. Overheating can decrease fuel efficiency, so proper ventilation and regular checks of the cooling system are essential to avoid this issue.
- Minimize Idle Time: Reducing the amount of time the generator spends idling can save fuel. If the generator is not in use, it should be turned off to prevent unnecessary fuel consumption.
- Install Fuel Management Systems: Utilizing advanced fuel management systems can monitor and optimize fuel usage. These systems can provide insights into fuel consumption patterns, helping operators to make informed decisions to enhance efficiency.
- Proper Sizing: Choosing a generator that is appropriately sized for the application is critical. An oversized generator can lead to inefficiencies, as it will not operate at its optimal capacity, leading to increased fuel consumption.