Hey, I'm going to be getting my 300 gallon farm tank filled soon with non-ethanol 87 octane 'Farm Gas.' I had it filled 4 years ago and I just finally ran out. Back then things were cheaper so I put a gallon of seafoam and a gallon of sta-bil in it when it was initially filled. If I do that again, it'll be over $100 just in additives. The classic tractors were still running fine this year with 4-year old gas although I could tell they weren't as happy under load as they are with fresh gas.
Also, that last fill was summer gas and this will be a winter blend so it'll have a lower flash-point which in-itself may extend the life. The tank has a pressure relief cap so it doesn't just evaporate, it needs to overcome a few PSI or a few in/Hg before it opens to the atmosphere.
Anyway, I'm just wondering if anybody has experience keeping gas volatile for an extended period of time? Should I have added something at 2-years instead of initially?
This mainly applies to my large tank but I am also curious for lesser-run equipment like generators, boats, project cars, etc. This discussion may be useful to others who are considering storing extra gas for emergencies too.
Also, that last fill was summer gas and this will be a winter blend so it'll have a lower flash-point which in-itself may extend the life. The tank has a pressure relief cap so it doesn't just evaporate, it needs to overcome a few PSI or a few in/Hg before it opens to the atmosphere.
Anyway, I'm just wondering if anybody has experience keeping gas volatile for an extended period of time? Should I have added something at 2-years instead of initially?
This mainly applies to my large tank but I am also curious for lesser-run equipment like generators, boats, project cars, etc. This discussion may be useful to others who are considering storing extra gas for emergencies too.