Best Octane Boosters in the UK

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.

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.

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.

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.

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.