It seems not all camping gas canisters are equal. Here is what I have learnt. These are my views, from my experience. Some stoves (Primus ULTI) really do not like Coleman Gas that does not include ISOButane. I don't even mean that it doesn't like it. I mean that it will catastrophically damage your stove. Be careful when it comes to your choice of canister gas. They really are not equal. | Canister | Propane % | Isobutane % | Butane (n-butane) % | Temp | Notes | | -------------------------------------------------------------------------------------------------------------------------- | --------- | ----------- | ------------------- | -------------- | --------------------------- | | Coleman Performance Gas | | No | | | Do not use with Primus ULTI | | Coleman Xtreme 2.0 C100<br><br>https://www.colemanuk.co.uk/stoves-fuel/gas-fuel/c100-xtreme-gas-cartridge/SAP_2182916.html | 40% | 0% | 60% | Down to -27ºC | Do not use with Primus ULTI | | MSR ISOPro fuel<br><br>https://cascadedesigns.com/products/msr-isopro-fuel | 20% | 80% | <5% (max) | | | | Jetboil JetPower fuel<br><br>https://www.jetboil.co.uk/products/jetpower-fuel | 20% | 80% | | | | | Primus Summer Gas<br><br>https://primusequipment.com/en/products/summer-gas | Yes | No | Yes | 15ºC and above | Do not use with Primus ULTI | | Primus Power Gas | 20% | 80% | | | | | Primus Winter Gas<br><br>https://primusequipment.com/en/products/winter-gas | 20% | 80% | | Down to -22ºC | | | Primus SIP Power Gas<br><br>https://primusequipment.com/en/products/sip-power-gas | Yes | No | Yes | Sping to Fall | | If numbers are not listed, I am reaching out to the manufacturer for information.