Best Octane Boosters in the UK

Review & Comparison, Last Update September 22, 2020
Increasing the fuel's octane count, octane boosters can turn cheap petrol into practically racing petrol. The best octane boosters will also clean the fuel system, minimise knocking, prevent corrosion, improve acceleration, and more. ...Read more ...Read less
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BEST 2020
PROS
CONS
OUR VERDICT
Kit Contents
Increases the Octane Numbers
Main Components
Recommended Dosage
Warranty
 
PROS

The booster makes combustion more uniform and also more controlled. Eliminating engine head beats (usually stemming from pre-ignition as well as detonation), this product is able to smooth out ignition. 

CONS

You'll start seeing visible results only after 2-3 applications. 

OUR VERDICT

Cars with a high mileage that have seen better days will start working almost like new with Bardahl Octane Booster Car Additive. Incorporating fuel additives, this product removes post-ignition deposits from the combustion chamber, increasing its lifespan. 

detailed parameters
Kit Contents

3 bottles x 250 ml each

Increases the Octane Numbers

Up to 5 points

Main Components

Hydrocarbons, C10-C13, n-alkanes, isoalkanes, cyclics <2% aromatics, solvent naphtha (petroleum), heavy aromatic

Recommended Dosage

250 ml of octane booster per 40 litres of fuel 

Warranty

Amazon's 30-day return policy

PROS

The compound is excellent at protecting metal parts against corrosion and preventing fuel-system corrosion. As long as you stick with unhardened valve seats, the product will be able to minimise valve seat recession.

CONS

Avoid the compound coming in contact with the skin. 

OUR VERDICT

Millers Oils VSPe Power Plus delivers ethanol protection, replaces lead, and adds 2 octane numbers to unleaded fuel. What's more, incorporating anti-oxidants, the solution also improves fuel life, working with petrol-fuelled engines (including carburetted and fuel-injected).

detailed parameters
Kit Contents

1 bottle x 250 ml

Increases the Octane Numbers

Up to 20 points

Main Components

Petroleum distillates, kerosine, potassium carboxylate, potassium soap, trimethylbenzene 

Recommended Dosage

250 ml of octane booster per 50 litres of fuel 

Warranty

Amazon's 30-day return policy

PROS

The solution can add 3.5 octane numbers (35 points) to leaded and unleaded fuel. It will be promoting clean fuel burn with fewer emissions. Even working with high-compression models, the compound will be able to raise MPG and stop knocks. 

CONS

There's something inconvenient about the label on the bottle's neck. 

OUR VERDICT

Lucas Octane Booster is the most cost-effective solution within this selection and maybe even the most effective solution in general (it is certainly up there, at the very least). Plus, the formula does not contain dangerous chemicals, so the oxygen sensors, catalytic converters, and turbines will be safe. 

detailed parameters
Kit Contents

2 bottles x 155 ml each

Increases the Octane Numbers

Up to 35 points

Main Components

Petroleum distillates, naphthalene, methylcyclopentadienyl manganese tricarbonyl (MMT) 

Recommended Dosage

155 ml of octane booster per ~56 litres of fuel 

Warranty

Amazon's 30-day return policy

PROS

The product is compatible with carburetted engines, fuel-injected engines, and most catalytic converters. It is able to minimise engine clogging as well. With its uniform neck, the bottle enables effortless spill-free pouring. 

CONS

The product is a bit overpriced considering the volume. 

OUR VERDICT

Bardahl 2 A4 Octane Booster will accommodate racing and motorcycle enthusiasts first and foremost. Increasing the engine's torque as well as its speed by up to 5 HP, this compound smoothes out ignition, prevents knocks, and minimises detonation. 

detailed parameters
Kit Contents

1 bottle x 150 ml

Increases the Octane Numbers

Up to 5 points

Main Components

Hydrocarbons, C10-C13, n-alkanes, isoalkanes, cyclics <2% aromatics, solvent naphtha (petroleum), heavy aromatic 

Recommended Dosage

150 ml of octane booster per 20 litres of fuel (per 10 litres of fuel for sporty usage) 

Warranty

Amazon's 30-day return policy

PROS

This octane booster reduces engine stuttering, prevents weak acceleration, and minimises unround idle, making sure that the idling part is always smooth and quiet. The compound will also be able to eliminate knocking and ringing.

CONS

The smell is strong and it doesn't go away easily. 

OUR VERDICT

Inox Octane Booster Petrol Additive will be improving your vehicle's start behaviour as well as full-load drive. The product will also be able to clean the entire fuel system (including the combustion chambers and valves), removing residue and deposits.

detailed parameters
Kit Contents

1 bottle x 250 ml

Increases the Octane Numbers

Up to 9 points

Main Components

Petroleum distillates, kerosine, potassium carboxylate, potassium soap, trimethyl benzene 

Recommended Dosage

250 ml of octane booster per 50 litres of fuel

Warranty

Amazon's 30-day return policy

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Bardahl Octane Booster

Controlled Uniform Combustion

Bardahl Octane Booster Car Additive increases gasoline's octane number without delay, ensuring more controlled and more uniform combustion. In the same vein, the solution increases the engine's output and nervousness. Eliminating engine head beats that come from pre-ignition and detonation, the product smoothes out ignition. All that being said, the biggest difference between this compound and everyday octane boosters is that this one also incorporates fuel additives, removing post-ignition deposits from the combustion chamber. As you can imagine, this approach increases the chamber's lifespan.

On the downside, maybe this is the case due to these additives, maybe not, but the solution is seldom effective from the get-go, usually requiring 2-3 applications to produce visible results. Nevertheless, the recommended dosage here is fairly standard: 250 millilitres of octane booster per 40 litres of fuel. Also, to improve the results, we would recommend pouring the additive before filling the tank with gasoline to the brim. Then, you can fill the tank, making sure that the two compounds mix as they should.

In short, whilst versatile, Bardahl Octane Booster Car Additive will prove the best fit for people with relatively old cars/high mileage first and foremost.

Review of Bardahl Octane Booster Car Additive

Additional Info

    Manufacturer


 

Millers Oils VSPe Power Plus

Love and Care

Millers Oils VSPe Power Plus treats cars with the love and care they deserve. First and foremost, this is an all-purpose product, with its one-shot approach delivering ethanol protection, replacing lead, and adding two octane numbers (20 points) to unleaded fuel.

Formulated to accommodate petrol-fuelled engines (both fuel-injected and the ones that employ carburettors), this compound protects metal parts from corrosion, including fuel-system corrosion. Apart from that, the anti-icing formula will treat carburettors, making sure that they can go the distance without frequent maintenance.

The product is pretty great at preventing valve seat recession (when paired with unhardened valve seats). It is also quite good at minimising detonation, hot spots, and running-on issues.

With the formula adopting anti-oxidants, this compound from Millers is able to improve fuel life and combat ethanol's adverse effects on fuel (up to E10). But because the main components also include potassium carboxylate and trimethyl benzene, make sure that the solution doesn't come in contact with the skin. As long as you do that, there's a very little chance you'll regret sticking with Millers Oils VSPe Power Plus.

Review of Millers Oils VSPe Power Plus Octane Booster Fuel Additive Treatment

Additional Info

User Manual     Manufacturer


 

Lucas Octane Booster

Stopping Knocks and Raising MPG

Lucas Octane Booster is pretty cheap. Still, despite how affordable this product is, its formula is plenty effective. To start with, the compound adds 3.5 octane numbers (35 points) to leaded as well as unleaded fuel. Needless to say, this is more boost than what the competition is usually offering, much more. Also, because the product is formulated without dangerous chemicals, you can work with this one without worrying about damaging oxygen sensors, catalytic converters, or turbines. Even when used with high-compression engines, this product excels at stopping knocks and raising MPG.

Not unlike the previous entry on this ist, what the people at Lucas are offering here is compatible with carburetted as well as fuel-injected engines. Likewise, borrowing from the common octane boosters' playbook, this product is able to promote clean fuel burn, reducing emissions.

We're not necessarily crazy about the bottle though. To be more specific, there's something inconvenient about the label on the bottle's neck, something that can make pouring inconvenient.

Barring this little mistake, Lucas Octane Booster is hands-down the most effective solution within its price bracket, no contest, not even close.

Review of Lucas Octane Booster 155ml (2)

 

Bardahl 2 A4

Sporty Usage

Bardahl 2 A4 Octane Booster is not necessarily bad but also not quite as impressive as the company's previous entry listed here. First off, the package is somewhat overpriced considering the volume (you're paying ~15 quid for one 150-millilitre bottle). Besides that, the compound adds 5 points to the octane rate, which is not terrible, but also nothing to write home about.

On the upside, this product works with fuel-injected engines as well as those engines that use carburettors. The solution is also compatible with most catalytic converters. Performance-wise, this agent can increase the engine's torque and add about ~5 HP. Aside from boosting overall performance, this product is no slouch at improving combustion, thus minimising engine clogging.

Last but not least, since the neck is not especially large, the bottle enables spill-free pouring (recommended dosage is 150 millilitres of octane booster per 20 litres of fuel and the same amount per 10 litres of fuel for sporty usage).

All things considered, as much as Bardahl 2 A4 Octane Booster works with cars, this is the product that will primarily attract motorcycle enthusiasts. Boosted with this compound, even bikes with an already imposing attitude will become less humble.

Review of Bardahl 2 A4 Octane Booster

Additional Info

    Manufacturer


 

Inox octane booster

Performance-Enhancing Drug

Inox Octane Booster Petrol Additive is a performance-enhancing drug with nothing but positive short-term as well as long-term effects. Increasing the fuel's octane count (somewhere between 4 and 9 points depending on its quality), this product can put cheap fuel almost on the same level as racing petrol. Once applied, this petrol additive starts increasing the engine's PS and torque right away.

Of course, the product will be able to improve the vehicle's start behaviour and full-load drive, that goes without saying. Apart from that, this one will also work towards cleaning the entire fuel system, dissolving the deposits and residue that subside there. When we're saying 'the entire fuel system', we also mean the valves and combustion chambers that the compound cleans and protects from deposits, preventing mechanical damage. Ensuring smooth and quiet idling is one thing but reducing engine stuttering, weak acceleration, and unround idle is a whole different animal.

The smell is strong, that's the one thing we dislike about this product. Still, considering the price relative to everything that this compound is offering, it is hard to imagine a petrol-fuelled vehicle that could not benefit from Inox Octane Booster Petrol Additive.

Review of Inox octane booster petrol additive

 

What Are Octane Boosters?

Octane boosters increase the fuel's octane count, adding somewhere between 5 and 35 points (0.5 - 3.5 octane numbers) to leaded and lead-free fuel. Whilst this is these boosters' primary purpose, they can usually do much more than that. More often than not, these compounds can improve combustion, increasing fuel's efficiency. There are products that can reduce engine clogging and products that can also minimise engine stuttering, prevent weak acceleration, as well as eliminate unround idle. Some boosters clean the fuel system, removing post-ignition deposits, residue, and more. Needless to say, the ones that do that also decrease long-term engine damage, so you waste less money on expensive repairs down the road.

There are octane boosters that can raise the vehicle's MPG and boosters that can eliminate knocks and prevent ringing. The best boosters can even ensure more uniform combustion, minimising destination. Wrapping the description, some compounds work with carburetted engines, some with fuel-injected, and some are compatible with both, so make sure you get this part right before purchasing one.

Though these boosters usually clean the fuel system as well, they're not as good at it as engine degreasers and fuel injectors cleaners, so we would recommend looking towards those too.

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Publish Date: 2020-09-22 14:45:55