Stagnate Diesel Fuel Biocide

Cummins recommended. Can be bought at Auto zone and O’rielly’s. Around $30. 16oz. Will do 50-100 gallons. Dose depends on severity. Once that algae or asphalt gets a hold of the tank walls you have to add it to every fill up until tanks are clear.

 

Any marine grade biocide is good.
Make sure to give him at least a 6 pack of fuel water separators and insure he knows how to change them. If he does not have a fuel pressure gauge install one.

 

Never have personally, but heard good things through the vine.

 

Yes it worked well. Some vehicles were plugging filers badly after using. Put a cleanable inline screen on some smaller engines. Dumped the fuel and cleaned tanks on some larger engines. Could not afford to keep buying filters.
Others used a filter or two and life was good.

 

Do you have much experience using this stuff?
I just dosed my reefer tank,it says 1oz per twenty gallon. I put 8oz in a 50 gallon tank. You think I should dump the rest in?
Do you normally let it set a day or two?

 

Since my stuff sits more than normal I fill my tanks all the way full if possible. I put the stuff in and fill up when i know it will sit at least a couple days. I been doing 6 oz in each of my 90 gallon tanks without problems. It darkens the fuel as it dissolves the black crud off the tanks but doesn't seem to effect engine performance at all. Haven’t had many problems with filters clogging to bad either. I think it dissolves majority of the stuff back into the liquid so not to many loose chunks end up floating around in fuel.
I don’t think using the whole bottle will hurt a thing. The high dosage “shock treatment” as they call it is sometimes needed at first to get control of it. Then you do the smaller doses with every fill up till its gone.
I have three old 100 gallon western star tanks on stands i been storing fuel in. I put a whole bottle in each one once a year for maintenance.

 

This looks more like a varnish build up. I haven’t seen anything on the screen yet.

 

Howes probably works as good as anything. Every winter, when I get into sub-zero, upper midwest, I use Howes. When I do, the filter is usually black and full by the end of the week. I say nothing to the shop, other than the filter needs changed. That’s with regular miles/usage, so there’s always a certain amount of fungus in the tanks.