Winter Storage with Full Tank Of Gas or Not?
Do you store your RV with a full tank of gas (to cut down on condensation in the gas tank), or fill it up with fresh gas in the Spring? Thanks for your responses
Forum Discussion
JaxDad wrote:JaxDad has it 100% correct.babock wrote:The math is correct, the logic is deeply flawed, and since the OP is in Minnesota not California he probably has a valid concern.
Leave the tank without filling and just fill up in the spring.
Condensation in fuel tanks is a myth. If you had a 100 gallon fuel tank and it was completely empty except for 100% humidity air @ 70° and it all condensed you would get a grand total of 0.22 ounces of water.
The calculation of water content is for a SINGLE tank full of moist air.
Fuel tanks breathe, as the liquid and air warm up they expand and push out air, that evening they cool and condense pulling in replacement air which is generally very moist and the cycle starts all over again. This happens all year long, anytime it’s warmer during the day than it is at night.
Yet there is a ray of hope for those who don't fill up their fuel tank for long-term storage. Fuel today contains 10% ethanol which is alcohol which is gas line antifreeze, which is a water displacement. So if you have 10 gallons of fuel in your 55 gallon fuel tank, you have 1 gallon of gas line antifreeze. But still, you don't want to introduce water in your fuel system even though it is addressed via ethanol for the water rusts the bottom of the fuel tank, and rust particles in the fuel system.
