Join Date: Oct 2009
Location: Swarthmore, PA
Thanked 145 Times in 134 Posts
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Diesel fuel stabilizers
My new (to me) boat came with an almost full tank (needle on "F" but not pegged) of diesel fuel that was almost 2 years old. The surveyor said it looked clean, and both of the fuel filters were freshly replaced. I still see no signs of water in the Racor bowl.
I've been fortunate that everything has been running well. I didn't want to mix new fuel with old, so I ran the tank down to about 3/8 full. At this point the fuel gauge would bounce around a lot in rough seas, occasionally bouncing all the way down to "E". Since I don't know the tank gauge all that well yet, I decided to go ahead and top off the tank since we're getting to a time of year when condensation can be a problem. The tank took 15 gallons. Since the tank is 25 gallon capacity, it means that there were about 10 gallons of the old diesel left. I did not add any stabilizer (yet), although there was likely some in there from the prior owner.
The previous owner left behind two different stabilizers: a bottle of Biobor JF and a bottle of Starbrite EZ Stor EZ Start.
What do all of you know about these stabilizers? Which should I add? Should I add both? Should I add nothing? Should I buy something else to add? Do these stabilizers themselves go bad over time?
Rick S., Swarthmore, PA
USCG Certified Captain, OUPV and 50 Ton Master
ASA Certified 101/103/104/105/106
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2001 Catalina 34MkII Tall Rig Wing Keel Breakin' Away, Universal Diesel M35B, Mantus 35 lb. anchor, sailing out of Rock Hall Landing Marina
Last edited by TakeFive; 09-14-2016 at 01:37 PM.