How to Restore Old Gas in AST and USTs

I am no expert on this, but as no one else has replied in a couple days, I will venture a few thoughts.

Have you done any testing to see how far this older gasoline diverges from its original specifications? Octane decrease, for instance? Maybe it is still good, but lower octane, gasoline.

Can you blend it into fresh feedstock, perhaps with some filtration or other treatment?

Thanks.

Do you have any preferences for contact to suggest and facilitate my search or emailing to have a professional response.

I would appreciate it if you do.

Alas, I don't have oil refinery experience or any contacts to suggest. Among CR4, Rohrshach [spelling?] might know about this.

After 12 months the gasoline may still be usable so try a small quantity in engines you have at hand - your own fleet of vehicles maybe.

My own experience is of underground storage tanks where the gasoline changes state after a long period of inactivity. It can be almost impossible to suck this out of the tanks due to cavitation effects - the fuel breaks down under suction. The only way I know of beating this effect is to drop a quantity of new fuel into the tank to restore the original octane. The mixture is then taken back to the refinery and dumped into a larger, above-ground storage tank.

With an above-ground tank it should be easier to draw off the fuel and possibly pump it back into the original tank to stir the mass up a bit and break up any 'layering'. If this doesn't work you will have to mix your old fuel with new product, (possibly of a higher octane rating to speed up the process). Get rid of the dodgy fuel as quickly as possible, (preferably not via my local filling station).

Do you have any fuel analysis for this fuel? The best way to treat the fuel is to know its properties.

If I were to venture a guess, without scientific data, I would assume that varnish has been produced in the tanks. To alleviate the varnish, I would add one of 2 Schaeffer's fuel additives. These products will dissolve the varnish, assist with water dispertion, increase lubricity, and cause the engines to run as if the octane were higher than it actually is.

In addition to treating the fuel, I might also mix with some fresh fuel, depending on the severity of the problem.

If you are interested in these products, please <send a private message>. Of course, I would want to have as much information as possible, before making a judgement about treatment.

Sincerely,

Richard Greenwald

Lubricant Specialist - Schaeffer Manufacturing

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It must have been pretty low quality gasoline that deteriorated within 12 month? I guess you just panic. Go ahead and sell it that is best solution. Do not try to destroy your stock by messing with it! And for god's sake do not cause explosion of the gasoline. How do you know that its quality is below acceptable. It is true that in the US OIL Companies do some tricks to get more gasoline from less oil and convert heavy fractions into light, which with time converts in gummy that blocks carburetors. Do not wary about octane at all as the conversion increases that.

I live in Ohio, and the fuel we get here can start to go bad in 3 months!

The addition of ethanol, if used, also does not help the situation.

There are additives that improve the quality of fuel, and extend the life by stabilizing it. Even a good quality new fuel can be improved-upon with a good additive package.

Are you suggest selling-off low quality fuel without letting your customer know what he is getting?

Before purchasing large quantities of fuel, the logical process is test it first, then offer a price based on the results.

In this part of the world, it is common to have quantities of fuel laying in boats for extended periods of time. To resolve this problem a group of companies has sprung up known as "fuel polishers" They will test your fuel, and then filter it and add necessary additives to it, and then pump it back into your tank.

Try searching in your area for this service. Good luck.