Has an earned reputation for being one of the best octane boosters on the market, and works in almost any engine, including carbureted and fuel injected. Case of 12 bottles – each treats up to 25 gallons of gas.
Some users didn't notice results, and some didn't need a pack of 12 – otherwise it's hard to find complaints about this product.
Known for delivering results – produces noticeable gas mileage improvement and less knocking in most automobiles. A reliable stabilizing additive for consumers who use low-octane fuel.
The bottle doesn't have a long spout, which makes it awkward to put into the tank without spilling. Contains MMT, which may "gunk up" some spark plugs.
In impressive deal on a product that works for most vehicles at reducing pinging and knocking. A pack of six 16 oz. bottles. Ideal for boosting mpg for users who prefer to fuel up with low-octane gas.
Boosting benefits are a bit less noticeable compared to pricier brands, but it's a reasonable choice if you can't afford more.
In addition to reducing noises and improving power, this booster is made by a well-known name in the automotive industry and formulated to remove gunk in the fuel-intake system.
Small bottles – nearly 1/3 the size of some of most competitors.
Raises fuel octane levels up to 105, making it an ideal choice for racing, 2 stroke, and E85 engines. No alcohol.
Contains MMT – may cause clogs in fuel injectors or spark plugs with extended use. Known to cause damage to paint if leaked/spilled on it. Lack of long spout makes it challenging to use without spilling.
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If you drive a car, you know how good it feels to sit behind the wheel when the engine is humming smoothly. Not only does a healthy engine make your car sound and feel better on the road, but you’re also more likely to get better gas mileage. If your car sounds like a race car or a wreck when you rev the engine, it may have a lot to do with octane. And an octane booster could be the solution.
Whether you use a more affordable low-octane gasoline or a pricier high-octane fuel, periodically adding an octane booster to your fuel tank can help. But with so many different options on the market, how do you choose one that is both effective and affordable? We can help you decide.
At BestReviews, we take our role seriously. We want to help consumers get the best products and value for their money. If you were driven to our site to find an octane booster, we can steer you in the right direction. Above, you’ll find our top five recommendations. Below, you’ll find our shopping guide full of details and tips to further improve your purchasing experience.
Octane is a measurement of a gasoline engine’s performance – the higher the octane, the better the performance. A fuel with a higher octane number (such as 93) can withstand more compression before igniting. Higher octane fuel is used in high-performance engines, such as race cars and muscle cars.
Using a low-octane fuel in a high-performance engine can cause lots of problems, including the following:
Deposit buildup on spark plugs
Though automobiles differ, using a high- or low-octane fuel can noticeably affect a car’s performance. Most cars run more smoothly, get better gas mileage, and deliver more power with higher octane fuel, which can make using an octane booster a good idea.
More boost for your buck
Mechanics and gearheads know this product’s reputation for reliable octane-boosting results, making it one of the most popular options on the market. It earns praise for lowering emissions, boosting performance, and being safe to use in carbureted or fuel-injected engines.
Octane boosters are formulated with various additives to help reduce and prevent knocks and pings and improve engine performance.
Here are a few of the most common additives:
Aromatic alcohols, including benzine and toluene, are chemical compounds capable of increasing octane when they make up at least 10% of a booster’s formula. (Because they absorb quickly into the skin and lungs, you must take precautions when using these chemicals, such as wearing work gloves and a mask.)
Ethanol is often used in high-performance vehicles. However, if used at more than 10% concentration, special tuning and possibly larger injectors may be necessary. Ethanol can also cause corrosion if left to sit in the tank, so it isn’t ideal for the average auto.
MMT (methylcyclopentadienyl manganese tricarbonyl) is a common anti-knocking additive that works well in most vehicles, but it can cause some spark plug buildup.
Octane booster brands vary, but one bottle will typically treat one full tank of gasoline that is between 18 and 25 gallons. This is a handy measure to know when buying an octane booster.
Octane boosters in long-necked bottles are easiest to use because the bottle is specifically designed to fit the opening of a vehicle’s gas tank and reduce the likelihood of drips and spills.
In addition to reducing engine knocking and pinging, using an octane booster may also help in improving your gas mileage as a result of better engine performance.
When you consider the price of a single container of octane booster, it doesn’t seem very expensive. However, if you drive frequently and plan to treat your fuel every time you fill the tank, it can get pricey.
The benefits of using an octane booster outweigh the cost for many drivers, and you don’t necessarily need to spend a fortune. An inexpensive octane booster by a trusted brand can also be beneficial to your engine’s performance.
Expect to pay between $4 and $7 for a single bottle of octane booster for typical passenger vehicles.
Expect to pay $12 to $35 for a single bottle of octane booster for high-performance vehicles. However, pricier boosters often come in concentrated formulas capable of treating several tanks of fuel.
Boost your car’s performance for less
Just because you’re on a budget doesn’t mean you can’t boost your engine’s gas mileage, power, and acceleration with a quality product. For more than 40 years, 104+ Octane Boost has been satisfying customers by providing noticeable results at about half the cost of other options.
Use precautions when working with octane boosters. These products are formulated with harsh, flammable ingredients that are dangerous if inhaled, ingested, or spilled on the skin. Keep them out of the reach of children, away from animals, and clear of open flames. If you do get octane booster on your skin, wash it off immediately to prevent irritation. Never smoke while using an octane booster.
Consider using an octane booster every time you fill your gas tank. An octane booster isn’t a substitute for premium gas, but adding one to your tank each time you fill it will likely improve your engine’s performance, especially if you have a high-performance automobile.
Buy a funnel. If you prefer a brand that doesn’t come in a long-necked bottle, investing in a funnel will make it much easier to add the booster to your tank without spillage.
Q. I’d like to improve the performance of my diesel engine. Can I use an octane booster?
A. No. You should never use an octane booster in a vehicle with a diesel engine because the formula is only compatible with engines fueled by gasoline. Cetane boosters are specifically formulated for diesel engines.
Q. Should I put an octane booster in my tank before or after I fill it up?
A. The instructions vary for different brands, but it’s a good idea to fill your tank about halfway, add your octane booster, then finishing filling. This will help ensure that the booster mixes thoroughly with the gasoline.
Q. Are there any possible issues caused by using octane boosters?
A. For most vehicles, using fuel that doesn’t have a high enough octane rating poses more of an issue than using an octane booster. However, some ingredients, such as MMT, have been known to cause issues with sensors and spark plugs in some vehicles. If you have questions, be sure to read your owner’s manual and talk to your mechanic before using an octane booster.
Q. What if I spill octane booster on my car’s exterior?
A. Because octane boosters contain ingredients that can damage paint, it’s important to be careful when using one. Be sure to have rags or paper towels handy to immediately wipe away any spilled octane booster from your car’s paint or other components.
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