[This review was collected as part of a promotion.] This seems to do an okay job in resolving knocking. It minimized it in my mower but didn't completely eliminate it It did seem to help the mower work stronger though I appreciate the safety measures with a child safe cap. So many companies forget this on lawn or mechanical equipment.

Source:

[This review was collected as part of a promotion.] It was easy to use, seemed to work well. I imagine if you are consistent with it and use it often there would be a bigger impact on it's use. The size seemed to be good for my cars capacity.

Source:

[This review was collected as part of a promotion.] Quite impressed with how well this works. My mechanic actually recommended I use this awhile ago but never got around to it. But now that I had the opportunity now to do so, I'm glad I did. It really does enhance the performance and it may be placebo but I felt like that has lasted longer.

Source:

[This review was collected as part of a promotion.] I drive my SUV in a conservative way as to not abuse gas mileage. This product did not improve my gas mileage unfortunately. I had some noises coming from the engine that did go away!

Source:

[This review was collected as part of a promotion.] It's great for what it's meant for. I use it to help. Keep my engine running well when I'm towing on long stretches, It has the added benefit of also cleaning the fuel system. The octane boost is the best part you never know what's in the gas and it adds an extra layer of protection vehicles nowadays are way too expensive to not take care of them. It's not just good for vehicles either though. I also mix it into my lawnmowers fuel to keep the carb clean and to stabilize the fuel when I put my machine away for the winter this is not a substitute for proper fuel, however if your vehicle takes 91 then use 91. This is a good extra boost, but not a replacement for the real thing.

Source:

[This review was collected as part of a promotion.] I started using this on Monday in my BMW and I actually love it. I wasn't expecting to notice much of a difference, but after adding it, my car felt quicker and more responsive when accelerating. The engine also felt smoother, and honestly made the car more enjoyable to drive. It's easy to use too, just pour it into the gas tank and top up your gas. I'm really happy with how it performed so far and I'll definitely be using it again after every oil change.

Source:

[This review was collected as part of a promotion.] We have t used this one just yet but we have used gumout in the past. We have always had great results with their products nd know this will work just as well! Profotmance in our vehicles always have improved greatly after using these products!

Source:

[This review was collected as part of a promotion.] recently started using Gumout octane booster, and I am incredibly impressed with the results. It is super easy to use. You just poured the bottle into the gas tank, making it clean without any mess. I have noticed a significant change in my vehicle's performance, and it's smoother acceleration and a noticeable reduction in engine knocking and pinging.

Source:

[This review was collected as part of a promotion.] Initially I could not tell a difference in performance but after conducting some adjustments it deliver a slight performance boost. The volume is enough to get the job done with ease though. Overall a solid product

Source:

[This review was collected as part of a promotion.] Absolutely love this product! My car feels great and I'm really happy with results. Easy to use because u need just booster it to gas tank when filling up.

Source:

[This review was collected as part of a promotion.] I decided to give Octane booster a try and so far I'm happy with it. It's very easy to use and the bottle makes it simple to add to the fuel tank without making a mess. My car seems to run a little smoother and like how convenient is to use overall it's a practical product that I would consider buying again

Source:

[This review was collected as part of a promotion.] Excellent product! I had some older gas that was sitting around and I wanted to use in my lawnmower. Having had it sit around and get stale is not ideal, fortunately Gumout Octane Booster helped to restore the gasoline and allowed it to run smoothly in my mower. The directions on the bottle are straight forward and it is an excellent value! I would highly recommend!

Source:

[This review was collected as part of a promotion.] This was a nice product to have on hand and came in handy especially since my family owns and older vehicle. It didn't give my vehicle a boost and I appreciate the affordability of the product.

Source:

[This review was collected as part of a promotion.] Octane Booster was easy to use and instructions were simple and clear! It made the whole process clean, easy and quick. Very convenient product!

Source:

[This review was collected as part of a promotion.] Excellent octane booster. Running a Lexus that wants 91+, but sometimes I have to fill up with 89 in my area. Adding one of these during each fill up does the trick and my car runs smoother than ever. Great for extending the life of any engine and keeps it running clean and mean, but especially your premium fuel rides!

Source:

[This review was collected as part of a promotion.] I really love this product. We used it in our SUV and then bought more for our other vehicles. It really gives the car a boost and is so easy use. It's also super affordable!

Source:

[This review was collected as part of a promotion.] I found this product easy to use with clear and easy instructions on the back to simply add to an almost empty tank of gas. The packaging was easy to open and dispose of at the gas station. This helps me to easily give my car a little maintenance and give my car a boost for less than paying for premium fuel.

Source:

[This review was collected as part of a promotion.] I've never used this before and was excited to give it a try! I have an older truck so thought this was something great. I have notice a difference in my gas mileage! I looked up the price and see that they are very affordable as well so I'll be continuing this product

Source:

[This review was collected as part of a promotion.] I used the whole bottle as directed while my tank was nearly empty and immediately filled up with gasoline. The tank of guess I filled with seemed to last longer than usual and we all know that's important with how gas prices are now.

Source:

[This review was collected as part of a promotion.] I use the Octane Booster every other fuel up. I have an older car and I use the cheapest “regular” grade gas. This product helps with any knocking that tends to appear and it helps me maintain my engine life.

Source:

[This review was collected as part of a promotion.] I'm giving this product 3 stars because I personally didn't notice a big difference in vehicle performance after using it. I think my vehicle ran a little better for about 50 miles, and for the price, that's not too shabby. I might buy it again once in awhile when taking a road trip.

Source:

[This review was collected as part of a promotion.] Ever seen that meme where you give car "repair " fluid in place of actually repairing it? This is what I felt like using this. Drink your medicine car. What check engine light >_>. I mean it did give it a boost in performance and temporary fuel lasting effects but i think my car was like hmm thanks for the energy drink xD.

Source:

[This review was collected as part of a promotion.] Gumout Octane Booster is effective for reducing mild engine knocking, cleaning fuel system components,and slightly improving throttle response.

Source:

[This review was collected as part of a promotion.] Easy to use After just a few hours I noticed my car felt more responsive its boost fuel octane and helps reduce engine knocking. With thin liquid consistency that makes it simple to pour neatly into the fuel tank

Source:

[This review was collected as part of a promotion.] This is great for a quick gas maintenance on cars, I did feel the RPM be smoother and I do think it helped gas efficiency. I drive a ton when I do delivery's and this was helpful.

Source:

[This review was collected as part of a promotion.] I recently used the Gumout Octane Booster and was impressed with its performance. This fuel additive is designed to maximize engine performance and protect against knocks and pings, and it delivers on both counts. After adding it to my tank, I noticed smoother acceleration and slightly improved responsiveness from my vehicle. The product is easy to use and comes in a convenient 10 fl. oz. bottle. While it isn't a permanent fix for larger engine issues, it's a reliable short-term performance booster. Overall, I'd recommend it to anyone looking for a simple way to enhance their car's driving experience.

Source:

[This review was collected as part of a promotion.] I tried the Gumout octane booster to see if it would help with My engine's perfomance. Installation was as simple as pouring it directly into a nearly empty gas tank before a full fill-up. It has excellent compatibility with standard unleaded gasoline. Eficiencia rendimiento para el mejor mantenimiento

Source:

[This review was collected as part of a promotion.] Works great the engine runs and drives beautifully, you can definitely tell it helps clean it out and gives a solid boost to the performance, solid product

Source:

[This review was collected as part of a promotion.] Its ingredients are good, it helps with consistency and performance, improves gasoline storage, and enhances your car's safety and cleanliness

Source:

[This review was collected as part of a promotion.] Good consistency when pouring in, does not smell when pouring. Can tell it's burning what doesn't need to be in the tank and cleaning it out. Good dose for tank of gas.

Source:

[This review was collected as part of a promotion.] The Gumout Octane Booster comes in a convenient bottle that is easy to store and handle. The bright color makes the product easy to identify. It is designed to help improve engine performance when used according to the instructions. Always follow the recommended dosage and safety precautions for proper use.

Source:

[This review was collected as part of a promotion.] I got this gumout octane booster in return for my honest review. It was super easy to use. It fit perfectly in the hole to my gas tank. It didn't leak at all. It gave my car that extra little boost it needed!

Source:

[This review was collected as part of a promotion.] This was easy to use, as you just have to pour it in. Unfortunately, I had no real noticeable changes with my vehicle. Maybe it's for a higher performance vehicle, I'm not sure.

Source:

[This review was collected as part of a promotion.] I am so glad I tested this product. I didn't realize that a product such as this one could actually save me gas. I normally pump twice a week, on Sunday and then again on Thursday when I a hit the quarter tank mark. However this time around, I only went through half of my tank versus three quarters. My Highlander is running smooth and I just loved seeing the efficient gas savings. This truly saved me some gas money and I am glad I tried it. At the current state of our gas prices, it makes sense to buy this octane booster to get more mileage from my fill ups since the price of a bottle is less than 4 bucks. Which is less than what I am currently paying for a gallon of fuel.

Source:

[This review was collected as part of a promotion.] I put this in my gas tank today while the tank was almost empty, then I filled up with regular gasoline. I have not yet noticed any change in performance, but the science backs up this being good for your vehicle!

Source:

[This review was collected as part of a promotion.] Very good and easy to use. Actually made my car run better after using it. Definitely worth the buy. You just add it to a full tank of gas. I added it before the gas .

Source:

[This review was collected as part of a promotion.] I used this in the gas tank of my Toyota Corolla. I feel like I'm getting better gas mileage now - before I was NOT happy with my gas mileage. I would definitely try this again if I notice anything changing.

Source:

[This review was collected as part of a promotion.] I drive a 20 year-old vehicle and this has helped the performance tremendously. It's super easy to use and my dad has used this for a long time and all of our vehicles.

Source:

[This review was collected as part of a promotion.] The Gumout Octane Booster is a quick, easy and cost-effective way to protect your engine, improve fuel economy, and boost your car's overall performance. I'd been experiencing some minor engine noises and knocking, and saw near-immediate improvement after using Gumout. The process couldn't have been easier—I added the Gumout Octane Booster directly into my tank just before getting a fill-up. Within days, I noticed improvements in acceleration and gas mileage. And my engine noises all but disappeared completely. I will most definitely be using this product in the future to maintain engine health.

Source:

[This review was collected as part of a promotion.] Very easy to use. It's very effective as well. The packaging is very good as well very easy to hold. A great drivability helps your engine tremendously!!

Source:

[This review was collected as part of a promotion.] Performance improves engine response, performance improves smoother acceleration, effectiveness helps increase octane and reduce knock, plus instructions are added to the tank according to the indicated dose and changes to the engine with more efficient and stable responses.

Source:

[This review was collected as part of a promotion.] The Gum Octane Booster helps my car feel “peppier” and quicker to react when I'm on the go. I felt like my car needed a little something extra to help it perform better.

Source:

[This review was collected as part of a promotion.] Gumout performance additives Octane Booster maximizes the performance of your vehicle effectively . Use of this liquid is very simple . It protects against Knocks and Pings . This product give boost octane rating . It helps to protect your fuel system . It's safe to use with other Gumout gasolines additives .

Source:

[This review was collected as part of a promotion.] The Gumout Octane Booster is a highly recommended product! I've noticed less vibrations, fuel economy seems a little better and the packaging is simple, easy to read and instructions are also very easy to understand. I definitely feel my car is running a lot smoother and easier.

Source:

[This review was collected as part of a promotion.] The Gumout Octane Booster was very easy to use - just add it to the gas tank as directed. My vehicle ran normally after using it and I didn't experience any issues. I can't say that I noticed a significant difference in performance or fuel economy, but that can be difficult to judge with a product like this under normal daily driving. Overall it was simple and convenient to use, so I would turn to this again if an octane booster is needed.

Source:

[This review was collected as part of a promotion.] I liked the design and how easy it was to use but I am not sure it made a big difference as the performance of my car engine seemed the same. I would recommend giving it a try.

Source:

[This review was collected as part of a promotion.] Gumout Octane Booster is an excellent solution for drivers looking to restore their engine's power and smoothness. Its formula effectively raises the octane level in gasoline, eliminating annoying engine knock and improving combustion during acceleration. Plus, its long-neck bottle design makes it easy to pour directly into the fuel tank without any spills. A practical and reliable additive to keep your vehicle running at its best.

Source:

[This review was collected as part of a promotion.] First time trying the product. I have an GMC Sierra 6.2 Callaway edition. Fuel requirement is premium but for this fill up I used regular fuel and used the Gum out product. Hopefully it'll be an positive effect.

Source:

[This review was collected as part of a promotion.] I tried the Gumout Octane Booster mainly out of curiosity. I'd never used one before. I was convinced it was largely a waste of money. After using it at the pump the other day, I've put it to the test with an hour commute both ways. So far the car runs noticeably smoother. Shifting transitions smoother, and the car accelerates faster without any jerk movements. I can honestly say I'm shocked.

Source:

[This review was collected as part of a promotion.] I've used Gumout Octane Booster, a couple of times now and have been happy with it. It's easy to add, and my trucks seems to run a little bit smoother, and I noticed that the pings have went away. I'll definitely use it again. 

Source: