The Primus OmniFuel II is a multi-fuel backpacking and expedition stove that burns screw-on gas canisters as well as liquid fuels such as white gas, unleaded petrol, kerosene, diesel and aviation fuel [1][2][3]. Retailers list a 3,000 W maximum output, a boil time of about three minutes per liter, and a weight of 375 g [1]. It is overkill for weekend canister cooking, but a strong fit for international travel, winter trips and expeditions where you cannot count on finding one fuel type.
Status: current (OmniFuel II)
The model sold today is the OmniFuel II, offered on its own or as a kit with a fuel bottle and pouch [1][2]. Retailers in Europe and the UK list it as a current product, though stock varies: Bergfreunde lists both versions [1], while V12 Outdoor showed the bottle kit as sold out when we checked [3]. We could not load Primus’s own product page, so the specs below come from authorized retailers. If you own an older stove sold simply as the “OmniFuel,” the sources we checked do not detail how it differs from the II.
Specs
| Spec | OmniFuel II |
|---|---|
| Fuels | Gas canisters, white gas, unleaded petrol, kerosene, diesel, aviation fuel [1][2][3] |
| Fuel connections | Fuel bottles and screw-on cartridges [1] |
| Max output | 3,000 W [1][2][3] |
| Boil time | 3 min per 1 L [1]; “just over three minutes” [3] |
| Fuel consumption | 196 g per hour [1] |
| Burn time | 70 min on 230 g of fuel [2] |
| Weight | 375 g [1][2]; Outnorth’s description also cites 450 g without saying what is included [2] |
| Dimensions | 14.2 x 8.8 x 6.6 cm [1] |
| Included | Burner, fuel line, ErgoPump, heat reflector, multitool with cleaning needle, windscreen, pouch [1] |
| Bottle kit adds | Fuel bottle and pouch [2]; V12 also lists multiple jets [3] |
Published numbers are not perfectly consistent. Outnorth’s product description cites a two-minute liter boil while its own spec table says three [2]. We use the three-minute figure that appears in the spec tables [1][2]. Real-world boil time will vary with fuel, altitude, temperature, wind and pot.
How multi-fuel stoves like this work
The OmniFuel II separates the burner from the fuel. A hose connects the burner to either a gas canister or a pressurized liquid-fuel bottle, which you pump up with the included ErgoPump [1]. Switching fuels means changing the connection and, for some fuels, the jet; the bottle kit includes multiple jets, according to V12 Outdoor [3]. The included multitool with cleaning needle is there for field maintenance, which dirtier fuels like diesel and kerosene make more necessary [1][3].
Follow Primus’s printed instructions for priming, fuel selection and jet changes, and only use stoves in well-ventilated areas.
Who it suits
- International travelers and expedition hikers who may only find kerosene, diesel or petrol along the way [1][3].
- Cold-weather and winter campers who prefer liquid fuel, with gas as an option when it suits.
- Group cooks and snow melters who want a high-output burner; 3,000 W is a lot of heat [1].
Who should skip it
- Weekend backpackers in North America who can buy canisters easily. A simple canister-top stove is lighter and simpler.
- Minimalists counting grams. At 375 g for the stove set [1], plus bottle and fuel, it is heavier than most canister setups.
- Anyone who does not want to maintain a stove. Liquid-fuel stoves need priming and occasional cleaning.
Current alternatives
| Stove | Fuels | Weight | Notable |
|---|---|---|---|
| MSR WhisperLite International | White gas, kerosene, unleaded auto fuel | 10.9 oz | Shaker Jet cleaning, nests in most MSR pots [4] |
| MSR XGK EX | White gas, kerosene, diesel and others | about 13.5 oz min | Built for extreme conditions, about 3.5 min liter boil on white gas [5] |
| Primus OmniLite Ti | Gas, petrol, diesel, kerosene, aviation fuel | 314 g with ErgoPump | Lighter titanium sibling, 2,600 W [6] |
MSR WhisperLite International. A long-running liquid-fuel stove. EMS lists white gas, kerosene and unleaded auto fuel, a weight of 10.9 oz, Shaker Jet field cleaning, and a kit with pump, windscreen, heat reflector and small-parts kit; the fuel bottle is not included [4]. It does not run on canisters.
MSR XGK EX. The expedition choice for snow melting and harsh conditions. Backcountry lists white gas, kerosene, diesel and other fuels, about 13.5 oz minimum weight, a boil time of about 3.5 minutes per liter on white gas, and a three-year limited warranty [5].
Primus OmniLite Ti. If you like the OmniFuel’s fuel flexibility but want less weight, Cotswold Outdoor lists the OmniLite Ti at 314 g including ErgoPump, 2,600 W output, a titanium windscreen and pot supports, and a 0.35 L fuel bottle in the box [6]. Note the same page also gives 341 g in a second spec field [6].
Bottom line
The OmniFuel II is a high-output stove for people who need fuel flexibility: canisters when they are easy to get, and liquid fuels when they are not. If you only ever use white gas, the WhisperLite International is simpler; if you are melting snow in the cold, the XGK EX is built for that job; and if weight matters most, the OmniLite Ti is the lighter Primus option.
Sources
- Bergfreunde — Primus OmniFuel II Multifuel stove (accessed Oct 8, 2026)
- Outnorth — Primus OmniFuel Stove II with Bottle & Pouch (accessed Oct 8, 2026)
- V12 Outdoor — OmniFuel II w/ Bottle & Pouch (accessed Oct 8, 2026)
- Eastern Mountain Sports — MSR WhisperLite International Stove (accessed Oct 8, 2026)
- Backcountry — MSR XGK EX Multi-Fuel Stove (accessed Oct 8, 2026)
- Cotswold Outdoor — Primus OmniLite Ti Stove (accessed Oct 8, 2026)