Fuel Additives

[Dustin07]

How much of what, are you guys using when you fuel up? and how frequently, at each fill up?

I asked on the FB group as well but thought I'd be redundant for more replies. they said startron +stabil marine formula. I was a little surprised to see a mix of two different treatments at each fill up, but again, I'm learning...

[Dustin07]

I could swear I always used seafoam for my 90hp outboard but it's been a while. nobody has yet mentioned seafoam so I wanted to see what people are actually using.

[mmwjr]

Seafoam is good for cleaning the system out but not a treatment to stabilize fuel against water absorption. Personally I use stabil marine for winter layup and nothing during the season. I would only use one type per fill up and stay with the same product throughout the season.

[shrew]

Startron and Seafoam are just two brands that do basically the same thing. They handle small amounts of water in the fuel.

Sta-bil is just a brand of fuel stabilizer that will attempt to prevent phase separation.

I use both Startron and Sta-bil (Marine) for ethenol with every fill-up. Seafoam and any brand of fuel stabilizer would be fine as well.

[mmwjr]

Originally Posted by shrew

Startron and Seafoam are just two brands that do basically the same thing. They handle small amounts of water in the fuel.

Sta-bil is just a brand of fuel stabilizer that will attempt to prevent phase separation.

I use both Startron and Sta-bil (Marine) for ethenol with every fill-up. Seafoam and any brand of fuel stabilizer would be fine as well.

Shrew isn’t you latest boat diesel power? If so I would treat the fuel as you are but feel in my case gas isn’t in my tank tank long enough to worry during the season.

[Phillbo]

I use stabil marine about every 4th fueling but then I fuel when the tank gets to 3/4 since fuel is not always just around the corner on the lake.

[shrew]

Originally Posted by mmwjr

Shrew isn’t you latest boat diesel power? If so I would treat the fuel as you are but feel in my case gas isn’t in my tank tank long enough to worry during the season.

I still have a dinghy with a gas OB. I treat the diesel with Sta-bil for Diesel along with diesel biocides. I have a 300 Gallon tank and a single diesel that burns roughly 3.5 gallons per hour. I get a fuel fill-up once every fall.