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Best Octane Booster (Top 9 For 2019 With Buying Guide)

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Written by The Motor Guy

The Best Octane Booster - Top 9


Octane Boosters, myth or reality? Actually, the answer heavily depends on product quality.

Most, if not all, low-quality octane boosters are worthless. On the other hand, reputable octane boosters like the ones included in this article not only reliably increase your octane rating but also provides many extra features to enhance the internal combustion.

Want to find out more? Then keep reading and discover what is the Best Octane Booster for your particular application.

Before we start, here are a few terms we are going to use when talking about octane boosters:

  • Octane Booster Type: this is a completely subjective parameter used to easily classify octane boosters according to their main applications. 
  • Average Cost Per Gallon: since most octane boosters can be used in different concentrations, a fixed reference was needed in order to bring you a better idea regarding the product real cost. In this case, a 91 to 94 octane boost was used as the reference for cost calculation. Some products were not able to achieve that goal, in those cases, their nominal boost was used for the calculation.
  • Average Octane Boost: for the same reason explained above, a reference boost was chosen to give you an idea of each product potential. The 91 to 94 octane boost is only an arbitrary reference, it does not mean that you can’t use the products listed with 87 or 89 octane gasoline.
  • Maximum Octane Boost: this is another indicator of each octane booster theoretical maximum performance potential. Keep in mind that some products do not officially advertise their max.potential, especially non-racing octane boosters.

The Best Octane Booster - Detailed Reviews

'Best Professional Octane Booster'

Amazon.com prices as of  2019-07-17 at 02:23 UTC Details

Main Features
  • Professional Grade Booster
  • Promotes Cleaner Burning of Fuel
  • Safe to use in turbo powered cars

If you are looking for the best all-around, ready-to-use, Octane Booster then look no further Lucas OCTANE Booster is what you need. Quickly increase 3 whole octane numbers by just pouring a Lucas OCTANE Booster bottle into your tank!.

What Makes It Different?

Unlike cheap fuel additives, Lucas OCTANE Booster has been proven to increase the fuel octane level reliably. Its exclusive formula also enhances combustion efficiency thus improving fuel mileage. However, what makes this product fantastic is its ease of use. There are 3 different bottles sizes to choose from, just pick the right one depending on your fuel tank capacity and pour its entire content into your tank. That’s it! Lucas OCTANE Booster will instantly add 3 octane numbers to your existing fuel.

Quick Overview of Features

  • Octane Booster Type:  Professional-Grade Octane Booster
  • Average Cost Per Gallon: 0.25 US$ for a 91 to 94 octane boost.
  • Average Boost: boosts 91 octane Premium Unleaded to 94 octanes (using 0.6 oz of product for every gallon of 91 octane gasoline).
  • Max. Octane Boost from 93 gas: 96 octanes - 3 octane numbers (using 0.6 oz of product for every gallon of 93 octane gasoline).
  • Street Legal: No
  • Methylcyclopentadienyl Manganese Tricarbonyl (MMT): Yes
  • Safe For Fuel Injection Engines & Carburated Engines: Yes
  • Safe For Catalytic Converter & O2 Sensor: Yes
  • Safe For 2-Stroke Engines: No
  • Safe for Turbo and Supercharged Engines: Yes
  • Available Sizes: 2 oz (for 4-5 gallon tanks), 5.25 oz (up to 15 gallons tanks), 15 oz (up to 25 gallons tank).
Pros
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    Guaranteed 3 point octane boost
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    Very Easy To Use
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    Professional Grade Booster
  • Safe to use with turbos, oxygen sensors and catalytic converters
Cons
  • Not suitable for 2 stroke engines
  • Not the cheapest octane booster
'Best Octane Booster For Ethanol Enriched Fuels'

Amazon.com prices as of  2019-07-16 at 21:12 UTC Details

Main Features
  • Cleans fuel system
  • Absorbs Moisture
  • Safe To Use in All Gasoline Engines

Klotz OCTANE BOOSTER is the perfect 2-in-1 fuel treatment for your vehicle. You can increase the octane level while cleaning your fuel system. Its active compounds also enhance combustion efficiency boosting gas mileage. All in all, a solid option for your high-compression engine.

What Makes It Different?

As said above, the formula of Klotz OCTANE BOOSTER keeps your fuel system clean, increases your octane level and helps combustion performance. If that is not enough for you, it also absorbs moisture which makes Klotz OCTANE BOOSTER ideal for ethanol-enriched fuels.

Quick Overview Of Features

  • Octane Booster Type:  2-in-1 Octane Booster & Fuel System Cleaner.
  • Average Cost Per Gallon: 0.42 US$ for a 91 to 92 octane boost.
  • Average Boost: boosts 91 octane Premium Unleaded to 92 octanes (using 1 oz of product for every gallon of 91 octane gasoline).
  • Max. Octane Boost from 93 gas: 94 octanes - 1 octane number (using 1 oz of product for every gallon of 93 octane gasoline).
  • Street Legal: No
  • Methylcyclopentadienyl Manganese Tricarbonyl (MMT): No
  • Safe For Fuel Injection Engines & Carburated Engines: Yes
  • Safe For Catalytic Converter & O2 Sensor: Yes
  • Safe For 2-Stroke Engines: Yes
  • Safe for Turbo and Supercharged Engines: Yes
  • Available Sizes: 16 oz, 1 gallon
Pros
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    Fuel system cleaner and octane booster in one
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    Absorbs moisture in the fuel
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    Safe to use in most engines
Cons
  • May provide a lower octane boost than some other octane boosters

'Best 2 in 1 Octane Booster & Fuel System Cleaner'

Amazon.com prices as of  2019-07-17 at 02:23 UTC Details

Main Features
  • Can help to increase power
  • Cleans fuel system
  • Easy To Use Octane Booster

STP Octane Booster is the second 2-in-1 product of this list. Since it is designed with an automotive enthusiast audience in mind, this would be a perfect choice if you are looking for a safe fuel additive to use on a regular basis. 

What Makes It Different?

What makes STP Octane Booster different is its ease of use. On most vehicles, you just need to pour half bottle on your gas tank while filling it up. STP Octane Booster is not as strong as other fuel treatments, but that also makes it safe for use on any vehicle regularly.  

Quick Overview of Features

  • Octane Booster Type:  2-in-1 Octane Booster & Fuel System Cleaner.
  • Average Cost Per Gallon: 0.14 US$ for a 91 to 91.1 octane boost.
  • Average Boost: boosts 91 octane Premium Unleaded to 91.1 octanes (using 0.25 oz of product for every gallon of 91 octane gasoline).
  • Max. Octane Boost from 93 gas: 93.1 octanes - 0.1 octane number (using 1 oz of product for every gallon of 93 octane gasoline).
  • Street Legal: Yes
  • Methylcyclopentadienyl Manganese Tricarbonyl (MMT): No
  • Safe For Fuel Injection Engines & Carburated Engines: Yes
  • Safe For Catalytic Converter & O2 Sensor: Yes
  • Safe For 2-Stroke Engines: N/A
  • Safe for Turbo and Supercharged Engines: Yes
  • Available Sizes: 5.25 oz, 12 fl. oz
Pros
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    2 in 1 fuel system cleaner and octane booster
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    Safe to use in most 4 stroke engines
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    Available in a number of sizes
Cons
  • Not suitable for use with 2 stroke engines

'Best Racing-Grade Octane Booster'

Amazon.com prices as of  2019-07-16 at 21:13 UTC Details

Main Features
  • Professional Racing Octane Booster
  • Provides significant octane boost
  • Safe to use in most vehicles

Torco ACCELERATOR is so confident about its quality and results that is not marketed as an “Octane Booster” but as an unleaded race fuel concentrate. You won’t find another product offering such a performance boost as Torco ACCELERATOR does, its the closest you can get to race fuel (at a fraction of the cost).

What Makes It Different?

The ability to increase 91 octanes to a whopping 102-105 octanes is certainly a differentiating factor. Such a boost come at a price, around $2.3 per gallon, but considering that race fuel costs an average of US$ 9 per gallon, using Torco ACCELERATOR is still a bargain. 

Quick Overview Of Features

  • Octane Booster Type:  Racing-Grade Octane Booster
  • Average Cost Per Gallon: 2.3 US$ for a 91 to 102 octane boost.
  • Average Boost: boosts 91 octane Premium Unleaded to 102 octanes (using 3.2 oz of product for every gallon of 91 octane gasoline).
  • Max. Octane Boost from 93 gas: 107 octanes - 14 octane number (using 6.4 oz of product for every gallon of 93 octane gasoline).
  • Street Legal: No
  • Methylcyclopentadienyl Manganese Tricarbonyl (MMT): Yes
  • Safe For Fuel Injection Engines & Carburated Engines: Yes
  • Safe For Catalytic Converter & O2 Sensor: Yes
  • Safe For 2-Stroke Engines: No
  • Safe for Turbo and Supercharged Engines: Yes
  • Available Sizes: 8 oz, 32 fl. oz
Pros
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    Can give a huge octane boost up to 14 octane numbers
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    Well known brand offering consistent quality
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    Should be safe to use with most oxygen sensors and cats
Cons
  • Cost per gallon is high for casual users
  • Not suitable for 2 stroke engines


'Best Professional Grade Octane Booster'

Amazon.com prices as of  2019-07-17 at 02:23 UTC Details

Main Features
  • Increases octane number by up to 30 points
  • Cleans injectors and fuel system
  • Can increase power and acceleration

Producing a reliable octane booster is not easy. That’s why it’s important to choose a reputable brand that delivers what it promises. That’s exactly the case of Royal Purple. Its MAX-BOOST octane booster guarantees an increase of 3 numbers on your octane rating. Ready for a long trip? Perhaps a racing weekend? Royal Purple MAX-BOOST is the solution you need.

What Makes It Different?

Royal Purple MAX-BOOST is not only a high-quality fuel additive from a Premium brand, is way more than that. Its formula stabilizes fuel so both emissions and combustion efficiency are equally improved.

Quick Overview Of Features

  • Octane Booster Type:  Profesional-Grade Octane Booster
  • Average Cost Per Gallon: 0.55 US$ for a 91 to 94 octane boost.
  • Average Boost: boosts 91 octane Premium Unleaded to 94 octanes (using 1.25 oz of product for every gallon of 91 octane gasoline).
  • Max. Octane Boost from 93 gas: 96 octanes - 3 octane numbers (using 1.25 oz of product for every gallon of 93 octane gasoline).
  • Street Legal: No
  • Methylcyclopentadienyl Manganese Tricarbonyl (MMT): Yes
  • Safe For Fuel Injection Engines & Carburated Engines: Yes
  • Safe For Catalytic Converter & O2 Sensor: Yes
  • Safe For 2-Stroke Engines: No
  • Safe for Turbo and Supercharged Engines: Yes
  • Available Sizes: 16 oz
Pros
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    Safe to use with most 4 stroke engines
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    Gives a reliable increase in octane numbers
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    Easy to use octane booster from reliable brand
Cons
  • Not suitable for use with 2 stroke engines
  • Not the cheapest octane booster on the market

'Best Everyday Fuel Booster and Cleaner '

Amazon.com prices as of  2019-07-16 at 21:12 UTC Details

Main Features
  • Excellent Octane boost at a low price
  • Safe to use in all engines
  • Street legal

BOOSTane Premium is hands down your best option for improving your overall octane rating and maintaining your fuel system clean at a reasonable price. Since its street legal you can use it regularly without any worry. If you own a high-compression vehicle (no matter if it has a 4-stroke or 2-stroke engine) then BOOSTane Premium won’t let you down.

What Makes It Different?

Even though all octane boosters have the same goal (increasing the octane number) BOOSTane Premium focuses on offering a fuel treatment to customers living in areas without access to high octane fuels, customers owning cars that rely on leaded gasoline or simply enthusiasts looking for a high-quality fuel additive stabilizer that prevents engine knocking. Make no mistake, you can use BOOSTane Premium for racing, and high-performance sports cars as well, but since it's formulated for more mundane applications in mind, the company’s BOOSTane Professional would be more adequate for such purposes.

Quick Overview Of Features

  • Octane Booster Type:  Profesional-Grade 2-in-1 Octane Booster & Fuel System Cleaner.
  • Average Cost Per Gallon: 0.30US$ for a 91 to 94 octane boost.
  • Average Boost: boosts 91 octane Premium Unleaded to 94 octanes (using 0.24 oz of product for every gallon of 91 octane gasoline).
  • Max. Octane Boost from 93 gas: 103 octanes - 10 octane numbers (using 6.40 oz of product for every gallon of 93 octane gasoline).
  • Street Legal: Yes
  • Methylcyclopentadienyl Manganese Tricarbonyl (MMT): Yes
  • Safe For Fuel Injection Engines & Carburated Engines: Yes
  • Safe For Catalytic Converter & O2 Sensor: Yes
  • Safe For 2-Stroke Engines: Yes
  • Safe for Turbo and Supercharged Engines: Yes
  • Available Sizes: 16 oz
Pros
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    Street legal and safe to use in most engines
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    High quality octane booster
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    Cleans injectors and other fuel system components
Cons
  • More suited to amateur use than racing enthusiasts

'Best Race Track Proven Octane Booster'

Amazon.com prices as of  2019-07-16 at 21:12 UTC Details

Main Features
  • Proven to increase octane of fuel up to 105
  • Safe to use in most engines
  • Contains no lead or alcohol

As you may guess from its name, Race-Gas is not simply an octane booster. Similar to Torco ACCELERATOR, this is a race-grade product aimed at professional racers and super sport cars owners alike.

What Makes It Different?

Race-Gas is a race fuel concentrate. As such, you can expect huge increases in octane numbers depending on the quantity of product you are willing to use. Since Race-Gas is created by racers for racers you can also expect a superb performance and quality. 

Quick Overview Of Features

  • Octane Booster Type:  Racing-Grade Octane Booster
  • Average Cost Per Gallon: 2.15US$ for a 91 to 95 octane boost 
  • Average Boost: boosts 91 octane Premium Unleaded to 95 octanes (using 2 oz of product for every gallon of 91 octane gasoline).
  • Max. Octane Boost from 93 gas: 107 octanes - 14 octane numbers (using 7.0 oz of product for every gallon of 93 octane gasoline).
  • Street Legal: No
  • Methylcyclopentadienyl Manganese Tricarbonyl (MMT): Yes
  • Safe For Fuel Injection Engines & Carburated Engines: Yes
  • Safe For Catalytic Converter & O2 Sensor: Yes
  • Safe For 2-Stroke Engines: No
  • Safe for Turbo and Supercharged Engines: Yes
  • Available Sizes: 32 oz
Pros
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    Racing grade product
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    Won't harm oxygen sensors or catalytic converters
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    Uses MMT instead of alcohol
Cons
  • Can be expensive to use
  • Not the best option for everyday driving
  • Not street legal

'Best Value Octane Booster'

Amazon.com prices as of  2019-07-16 at 21:13 UTC Details

Main Features
  • Helps to increase power & acceleration
  • Street Legal
  • Can offer a cheaper way to increase octane of fuel

MAG 1 Octane Booster is the kind of fuel additives you can use on a regular basis. Its formula contains FMX Technology that protects your engine and enhances gas mileage at the same time that increases octane number.

What Makes It Different?

Opposed to racing-focused fuel treatments, MAG 1 Octane Booster is meant for an audience that looks for enhancing fuel quality and stability. Its FMX technology focuses on that, engine protection, and due to its Jet Fuel component, it also boosts octane level as well. 

Quick Overview Of Features

  • Octane Booster Type:  Everyday Usage
  • Average Cost Per Gallon: 0.12US$ for a 91 to 91.1 octane boost 
  • Average Boost: boosts 91 octane Premium Unleaded to 91.1 octanes (using 0.57 oz of product for every gallon of 91 octane gasoline).
  • Max. Octane Boost from 93 gas: 93.1 octanes - 0.1 octane numbers (using 0.57 oz of product for every gallon of 93 octane gasoline).
  • Street Legal: Yes
  • Methylcyclopentadienyl Manganese Tricarbonyl (MMT): No
  • Safe For Fuel Injection Engines & Carburated Engines: Yes
  • Safe For Catalytic Converter & O2 Sensor: Yes
  • Safe For 2-Stroke Engines: Yes
  • Safe for Turbo and Supercharged Engines: Yes
  • Available Sizes: 12 oz
Pros
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    Safe to use in all types of engine
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    Street legal
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    Great value option
Cons
  • Lower octane boost than other products

'Best All-Organic 2-in-1 Octane Booster & Fuel System Cleaner'

Amazon.com prices as of  2019-07-16 at 21:12 UTC Details

Main Features
  • All Organic (zero lead, magnesium or phosphorus)
  • Compatible with alcohol and nitro fuel mixtures
  • Street Legal

The final product on this list has an interesting approach using an All-Organic formula (lead-free and phosphorus-free composition). We are talking about the awesome MAXIMA HI-TEST octane booster. 

What Makes It Different?

Besides being metal-free, MAXIMA HI-TEST formula also includes special fuel additives that clean the fuel system thus enhancing gas mileage. The 2-in-1 proposition clearly makes MAXIMA HI-TEST an interesting product for mild-racing, everyday highway use or simply as an efficient alternative to avoid detonations on high-compression engines.

Quick Overview Of Features

  • Octane Booster Type:  2-in-1 Octane Booster & Fuel System Cleaner
  • Average Cost Per Gallon: 0.76US$ for a 91 to 91.4 octane boost 
  • Average Boost: boosts 91 octane Premium Unleaded to 91.4 octanes (using 1 oz of product for every gallon of 91 octane gasoline).
  • Max. Octane Boost from 93 gas: 94.6 octanes - 1.6 octane numbers (using 4 oz of product for every gallon of 93 octane gasoline).
  • Street Legal: Yes
  • Methylcyclopentadienyl Manganese Tricarbonyl (MMT): No
  • Safe For Fuel Injection Engines & Carburated Engines: Yes
  • Safe For Catalytic Converter & O2 Sensor: Yes
  • Safe For 2-Stroke Engines: Yes
  • Safe for Turbo and Supercharged Engines: Yes
  • Available Sizes: 16 oz
Pros
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    Can be used safely and regularly
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    All organic formulation
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    Also acts as a fuel system cleaner
Cons
  • Not suitable for racing or high performance applications

Best Octane Booster Buying Guide

The following table cross-references each of the reviewed octane boosters. Keep in mind that most professional and race-grade octane booster can be used with any pump gasoline kind (87, 89, 92, 93).


Type

CpG

 Boost from 91 octanes

Max Boost

Street Legal

Uses MMT

Lucas Octane Booster

Professional

0.25


94

96*

No

Yes

Klotz Octane Booster

Professional 2-in-1

0.42

92

94*

No

No

STP Octane Booster

Everyday 2-in-1

0.14

91.1

93.1*

Yes

No

Torco ACCELERATOR

Racing

2.30

102

107

No

Yes

Royal Purple MAX-BOOST

Professional

0.55

94

96*

No

Yes

BOOSTane Premium

Professional 2-in-1

0.30

94

103

Yes

Yes

Race-Gas

Racing

2.15

95

107

No

Yes

MAG 1 Octane Boost

Everyday

0.12

91.1

93.1*

Yes

No

MAXIMA HI-TEST

Everyday 2-in-1

0.76

91.4

94.6

Yes

No

Best Octane Booster Buying Guide



What Is An Octane Booster?

As its name implies, octane boosters main goal is increasing the gasoline octane number. You may wonder, why not buying Premium gasoline instead? The main reason is the cost. Using octane boosters is way cheaper than buying higher-grade fuel. However, the cost is not the only factor that makes octane boosters so popular. High octane fuel availability is also valid reason for using an octane booster. If you live in a zone with no access to 91-93 octane fuel an octane booster could solve your pre-ignition problems. That brings us to the next topic, why you need high octane fuel?

Depending on your engine compression ratio your car manufacturer may suggest an specific gasoline octane number. High compression engines are more susceptible to pinging and dieseling than low compression ones. That’s why they require higher octane, to avoid pre-ignition.

Since octane boosters contain fuel additives many brands include extra components to enhance even more fuel quality bringing benefits like:

  • Fuel system cleaners
  • Fuel stabilizers (allows longer periods of storage)
  • Upper cylinder lubricants, in many cases replacing leaded fuel properties not present in most unleaded pump gas. 
  • Combustion enhancers focusing on better fuel mileage and increased efficiency

How Do Octane Boosters Work?

To prevent the pre-ignition during the compression phase of gasoline engines an special component called anti-knock agent is added to the fuel. This special fuel additive has the property of increasing the temperature at which detonation happens thus eliminating pinging and dieseling problems. The are three main groups of anti-knock agents:

  • Aromatics: toluene and xylene are among the most widely used aromatic agents on refined gasoline. They do not show carcinogenic effects, contrary to benzene that is limited by U.S. EPA because of its harmful properties.
  • Oxygenates: alcohols like ethanol, methanol, and ethers like MTBE (methyl tertiary butyl ether) are also used to increase the octane number. One of the main disadvantages of alcohol-based oxygenates is that they reduce gas mileage and can damage fuel system components.
  • Organometallic Compounds: the usage of this kind of anti-knock agents are greatly limited due to its toxic nature. Included in this category is the tetraethyl lead (TEL) main component of leaded gasoline and the methylcyclopentadienyl manganese tricarbonyl (MMT), both banned from the commercial gasoline in the U.S. decades ago. Depending on the amount of MMT used some fuel system components (like the catalytic converter) could suffer serious damage.

For the reasons explained above, aromatic agents are the most widely used during gasoline refining. Octane boosters, especially professional-grade and racing-grade types, use oxygenates and/or organometallic compounds to increase octane numbers. That explains why only a few are street legal. One of the most controversial agents is the MMT due to its high toxicity, that’s why we included its presence in our list. 


5 Tips When Using Octane Boosters

Many octane boosters included in our list are tailored for casual/everyday usage. Just pour the entire bottle and enjoy. Nevertheless, is good to know a little more about the correct use of these additives:

  1. The golden rule when using ANY octane booster is reading the manufacturer indications BEFORE using it. As mentioned above some products are intended for direct usage, but others not. Using a lower concentration may not have any consequences (other than losing money). On the other hand, using an excessive concentration could be dangerous for your engine. Remember the prior section? Some anti-knock agents could damage your fuel system components if used on higher concentrations (MMT I am seeing you). 
  2. Try using an appropriate octane booster depending on your application. Some products are safe for use on 2-stroke engines, others don’t.  Once again, double check the manufacturer indications.
  3. Buy an octane booster in line with your expectations. Is your engine presenting occasional detonations during summertime? Then start using an everyday or “light” octane booster. You don’t need +14 octane numbers to solve that. The contrary is also valid. Are you planning a professional racing weekend? Then buy a good octane booster, not a general purpose one.
  4. For best results, pour the octane booster content just before adding the fuel. In other words, wait until your fuel tank level is low before using the product.
  5. Avoid storing unused octane booster. Most octane boosters are highly volatile, toxic and inflammable.