old diesel fuel in tank
I've had the same half-tank of diesel fuel in my Winnebago motorhome for about 2 years. The rig starts and runs fine, but it occurred to me that maybe I should put in an additive before taking it on ...
Forum Discussion
wolfe10 wrote:mowermech wrote:
Algae, I have read, only grows when water is in the tank. It grows at the water/fuel interface.
No water in tank, no need for biocide. Water in tank, the tank should be drained and cleaned, then filled with fuel, and all fuel filters replaced.
Correct.
But (OK large BUT) the original post said the tank was stored HALF FULL for two years. Very likely there has been enough condensation to provide the water necessary for microbe growth.
Storing with a full tank reduces condensation.
On the upside being in Michigan the rig is in storage during the cold months of November-April, which should help inhibit growth. I've had the rig since '17 and in all honesty have never added a biocide and never had an issue. The difference this time is COVID kept us from traveling in '20 which ended up doubling the time it sat untreated.
