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The Best 6 Fuel Additives for Old Gas

Whether you might be keeping fuel readily available as a part of a long-term prep in case of infrastructure collapse, or you simply need some able to go on your lawn mower or tools, rotating your gas generally is a major pain.

That’s because modern gasoline tends to go bad quickly, especially the stuff with ethanol in it…

fuel canister

If you employ old gas, at best, it just won’t work. At worst, it could possibly wreck your engine or your fuel system. Definitely not good!

But luckily, scientists and clever manufacturers have cracked this problem through the usage of additives designed to support the usage of old gas.

From eliminating water and restoring octane rating to stabilizing your stale gas before it gets too old, there’s something for each application.

I’ve brought you six of the perfect ones below…

Pros and Cons of Fuel Additives


  • Can dramatically extend shelf lifetime of gas, even ethanol blends, as much as 1 12 months – sometimes longer!
  • Additives can keep “stale” gas from degrading to point of uselessness.
  • Detergents and other chemicals can prevent older gas from gumming up or harming engines – low-cost insurance when working with older supplies!


  • Some products have to be fastidiously measured and added for correct function.
  • Octane additives could make gas too “hot,” potentially damaging engine or specific components.
  • Using additives increases cost of fuel supplies.

1. Sea Foam Motor Treatment

Sea Foam is a legendary name in fuel additives, they usually have something designed for engines large and small on land or at sea.

Their flagship product, motor treatment, is designed to stabilize gasoline and diesel fuel alike for as much as 2 years, and that’s for any mix of gasoline or diesel.

I do know most all-in-one products absolutely suck, but one way or the other those Sea Foam engineers used witchcraft or cutting-edge chemistry (or each) to make it occur.

Their Motor Treatment formula is advertised as not only stabilizing your fuel, but additionally:

  • cleansing your injectors and carburetors,
  • cleansing intake valves and fuel chambers of deposits,
  • lubricating cylinders,
  • and even being a useful additive for crankcase oil since it could possibly reduce and eliminate damaging built up deposits.

Best of all, it’s easy to make use of, just pour it straight into your tank, 1 oz for each gallon of fuel for normal use, or 2 oz per gallon for serious cleansing.

Added on to store fuel, 1 oz per gallon will stabilize your fuel, of any kind, for as much as 2 years. Amazing stuff, and my granddad used it so now I exploit it. Recommended!

2. Lucas Oil Fuel Stabilizer

Lucas Oil Products is one other huge name within the automotive game, and their fuel stabilizer does exactly what the name says: this little blue bottle will prevent your fuel from decaying during storage.

Even in case your fuel is getting a bit of stale, Lucas’s fuel stabilizer can halt the damage.

Even higher, these items has a repute for lubricating, cleansing, and improving the performance of fuel pumps and carbs and in addition your compression rings.

It is simple to make use of, only one fluid ounce to each 2.5 gallons of gasoline and that’s all you will have to recollect.

It might be used for any grade or octane rating of gasoline and can also be secure for two- and four-cycle small engines.

A medium-sized bottle will go a good distance, treating as much as 40 gallons of gasoline. Suitable for the most important of fuel tanks, or nearly a complete barrel stuffed with gasoline.

Available anywhere, cost-effective and straightforward to make use of. What’s not to love?

3. Lucas Oil Octane Booster

What are the issues related to old gasoline is a lack of performance since the volatile compounds that give the gas its bang begin to decay and break down.

This signifies that the octane rating of the gas decreases over time. One solution to reinvigorate your gas is to easily add latest gas to it, but that generally is a finicky and imprecise measure.

A greater solution to do it, especially if the gas isn’t too far gone, is to only reach for Lucas Oil’s octane booster.

Ready to be completely secure for contemporary oxygen and fuel system sensors and all catalytic converters, it could possibly resuscitate old gas and no time flat.

Note that you just’ll need to listen to the instructions, because it advises you so as to add a whole bottle into your tank, with the dimensions of the bottle being dictated on the dimensions of your tank, after which filling the tank all the best way up with fuel.

However, with a bit of little bit of math, you possibly can add it to your old gas and blend it or slosh it to mix them.

4. STA-BIL Fuel Stabilizer

One of the highest and most beloved names within the fuel additive game is stable, and their storage fuel stabilizer definitely does what it says.

If you will have old gas in a can or within the tank of your automobile, motorcycle, boat, other vehicle, or power tool that is what you would like.

When your gas is beginning to get stale, but before it goes totally bad, you possibly can add Sta-Bil to it to maintain it fresh, secure, and usable for as much as a 12 months.

It also has many useful additives that can prevent the formation of gum-producing compounds within the gas which can subsequently cause your fuel system and result in a devastating repair bill and even damage to your engine.

Corrosion-stopping additives further protect your engine and fuel system from degradation.

It works great, and you possibly can get it anywhere, but be certain that you listen to the instructions.

Sta-Bil recommends different dosages depending on how long you anticipate the fuel will sit before it’s used, so you may add kind of per gallon depending in your storage goals.

5. STP Water Remover

STP is one other long-time player within the fuel additive game, and certainly one of their best products is their Water Remover.

If you don’t know higher, it’d sound a bit of strange considering we were talking about gasoline.

But, once you recognize concerning the physics of gasoline, and particularly ethanol mix gasoline, you recognize how insidiously that stuff attracts water.

Especially in warm, humid weather, condensation forming in your gas can rapidly degrade it.

I colder weather, when your automobile is taken from outside to a hotter location or allowed it to chill down within the garage, condensation can likewise form and subsequently freeze in your fuel line.

Definitely an issue, that. And just as importantly, water tends to accumulate rapidly in old gasoline.

All you’ll have to do is add a bit of little bit of Water Remover to your gas, and also you won’t have a thing to fret about.

This is a terrific additive for older fuel that continues to be reasonably fresh, but has been stored in conditions which can be favorable to the formation of condensation.

6. Star Tron Enzyme Fuel Treatment

One of the perfect all-around additives for old fuel, whether it’s in your tank or in a can, is Star Tron’s Enzyme Fuel Treatment.

Using a novel mix of chemicals and enzymes, it would allow your engine to begin easily, safely, and easily when using ethanol gas blends which were sitting for a while.

This product will promote higher performance with older gasoline, and it could possibly be used in your newer gas to maintain it stable and fresh for two years with none worries of varnish formation or phasic separation that normally plagues modern gas.

Best of all, it’s adaptable for just about any gas engine you possibly can consider, for passenger vehicles, motorcycles, small engines and tools.

Even higher, the corporate guarantees that “overdosing” your fuel with this product won’t end in any damage or serious decrease in performance.

If you mostly sweat the mathematics when understanding the ratios of additive to fuel, this is perhaps the one you must go together with.

Easy to make use of, highly effective, and multi-purpose for old gas in or out of your vehicle that is certainly one of the more user friendly products in the marketplace.

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