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Diesel Fuel and storing diesel tractors

U

US244963

New User
Recently I had an issue with my 730 diesel where the fuel turned slimy (enzymes?) and I had to remove and flush out the tank and replace the pri/sec filters. For the past 5 years, I had been keeping the tank full and usually refresh it with about 8 gallons each fall of offroad diesel from my local Cenex station (20 gallon tank). I have added Seafoam each time, and some 911 additive.

The guy at my local Napa store tells me the shelf life of diesel now is only 30 days unless you treat it with a good enzyme stopper. He sold me a $23 bottle(treats 500 gals) of Soltron fuel additive. Says it is the only one that really stops enzymes from starting in diesel.

How are any other of you storing diesel tractors that don"t get used much? Best to keep the tank full or only fill it with a small amount? What are you guys using to treat it and how long can it last? Appreciate comments on this as I always thought diesel had the longest shelf life of the fuels. Guess I was wrong.
 
How old was the diesel that went bad. I have a lot of diesel around here that is over a year old and I don't have any trouble with it
Walt
 
Pure diesel will last a long time as long as there is no water in it. Water is what causes diesel to go bad or get alge in it. You might be getting alge from your supplier. They make an algecide for diesel. We put it in our storage tanks at work just to be on the safe side. Jim
 
Before there was biodiesel we got several cans of diesel from a station in St. Leon, IN that was already slime when we got it to the field that same day. Such fun, draining the fuel tank and flushing the fuel lines and injectors out in the hay field.

That was the only time we had a problem, diesel would sit for 6 months or more with no problem. Of course, that station never got another dime from us.
 
I don't believe that, I have a 1/2 tank of home heating oil left for the oil boiler since 3 years ago and it's fine, I also run furnace oil in my tractors too, it sits for a year or less, I do treat the hho for the tractors with power service diesel supplement. Don't treat the oil for the oil boiler though.
 
The new ultra low sulphur diesel has approx 3% water homoginized in it that is the summer blend make sure you have winter blend and you should be good.
 
The 911 is meant only for liquifying gelled fuel. Use the white bottle Power Service for fuel treating. That said I've never had problems with old diesel fuel.
 
I treat my furnace tank with a biocide called Biobore, get it at a marina. Heat mostly with wood so don 't use much oil. Use enough diesel that I haven't had any problems, but I do use Power Service in the winter, white bottle. All the diesel and furnace oil here in Mn. is B-2.
 
30 days?? Why would a person at NAPA know anything?

Diesel fuel tends to get bacteria growth in it if any water is present. Bacteria are NOT enzymes. The little bacteria bugs - dead or alive will plug filters and look like slime.

Some fuel treatments claim to USE enzymes in order to clean you fuel. I use any geneic biocide I can find. If you fuel has bacteria, killing it does not remove the critters. Just stops them from growing. Dead or alive, they still plug filters

My Chevy diesel snow-plow truck got it's last tank full 5 years ago. Starts and runs great. 45 gallon tank and not much snow results in a tank lasting along time on off-road plow truck.

I also recently started a IH tractor with diesel fuel in it at least 10 years old. Works fine.
 
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