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Re: What does fuel stabilizer actually do ?


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Posted by Mutt and Jeff on October 14, 2019 at 09:43:33 from (64.222.110.84):

In Reply to: What does fuel stabilizer actually do ? posted by Crazy Horse on October 14, 2019 at 09:20:29:

It is magic and science.
believers will believe
and naysayers will deny


Fuel stabilizer works to stop this oxidation and chemical breakdown from happening. By pouring it into your tank and running the engine for a few minutes to distribute it through the system, it functions partly as an antioxidant and partly by absorbing water before your fuel can do the same.

Seafoam (http://www.seafoamsales.com/msds-downloads.html): 40-60% Pale Oil, 25-35% Naptha, 10-20% Isopropyl Alcohol

Sta-Bil (http://www.sta-bil.com.au/pdfs/STA%20-% ... iliser.pdf): 95% Kerosene, 5% Additive Mixture

The common ingredient between the two products are light mineral oils (Pale Oil and Kerosene). I was thinking that maybe that's what preserves/stabilizes the gasoline? If so, how exactly does it do that, chemically?


Generally speaking, the oxidation that occurs happens catalytically. Once a trace amount of a type of decomposition known as radical formation occurs, it's a downhill cascade. Stabilizers (which btw are not detergents) act as dead ends for these catalytic cycles. You can look up what exactly a radical is, but generally speaking all you need to know is that it's highly reactive and leads to all sorts of pathways that don't normally happen and leads to sever decomposition.

The mechanism, no matter what the stabilizer is roughly the same. The radicals are still there, just occupied in the form of the stabilizer, which doesn't propagate a cascade to further degrade whatever it's in.

All sorts of things can trigger the initial degradation; from oxygen, to light, to thermal decay.
Stabilizers are used in everything industrially. An example of such stabilizers that's extremely common even in the food we eat is something called BHT, which is also used as a common stabilizer in many solvents.


They are liquid forms of
smoke
and
mirrors


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