Best Octane Boosters of 2025

"Living in Colorado, I noticed that at high elevations, using the Lucas octane booster made a huge difference in my 2003 Audi RS6's performance. It ran a best of 14.1 seconds at Bandimere, which was over half a second quicker than without it. Now, I use it for all my turbo cars!"

"I drive a 2014 Mazda CX-50 Turbo and for optimal horsepower, I usually need 93 octane. However, I prefer running 91-octane non-ethanol fuel combined with the Lucas booster, and it feels much peppier on the highway. I'm really pleased with the results!"

"I've been using the Lucas octane booster in my Harley Davidson, and I've seen an average increase of 4 mpg. It's been a great addition, and I'm very happy with this product!"

"I’ve noticed an extra 2 to 3 mpg per tank using this product. However, with the price creeping up, I may switch to premium gas soon."

"I use this in my tuned vehicle to avoid spark knock. It's much cheaper than 93 octane, and it works perfectly!"

"For my 1986 Porsche 944 turbo, the results are incredible! Mixing it with 93 octane makes it feel like a rocket. I highly recommend it for turbo cars!"

"I've noticed a boost in mileage after using this product for years. My truck, which has 171,000 miles, achieves 20-22 miles per gallon without any engine problems."

"In the past, my car would drop from 30 miles per gallon to 25 miles per gallon. After adding a bottle of this, it always returned to 30 miles per gallon. Now, I use it in all my cars."

"I've been using this product for years; it's the cheapest mechanic you can hire and even more affordable than Walmart. I can't find a reason not to like it."

"I’ve been using this product for all my vehicles, and I can confidently say it works! My Yamaha Raptor runs great, and while I didn’t notice a huge power increase, the engine responds well. The same goes for my Yamaha WR450F; it hasn’t gotten worse, and the combustion seems optimized with less soot in the exhaust. The real surprise was with my China scooters. They had been struggling, but after adding the K&N octane booster, they now start better and run smoothly without any smoking or knocking. It’s definitely worth it, especially for carbureted and air-cooled engines in hot climates!"

"I love this product! It has noticeably increased power and improved fuel consumption. I use it in every tank now!"

"I've tried other brands, but this one is better and more affordable. It definitely makes my car run smoother. While it’s not like getting a new engine, it’s a great option if you're experiencing knocking or suspect bad gas."

"I found this octane booster to be great for my car, but it’s frustrating that I can’t buy it in smaller packs. Switching brands caused damage to my vehicle, so I appreciate this product’s effectiveness."

"In a pinch, I used this octane booster after accidentally filling my vehicle with 87 octane instead of 91. The knocking noise disappeared, so I’m relieved it worked, though I'm concerned about potential engine damage."

"I've been using this in my Mustang and noticed a definite improvement after several applications. The throttle response in higher gears has become much better, and I love the blend of octane boost and fuel system cleaning benefits."

“I found that only metal can octane boosters work when I raced at Bandimere's. This product boosts the octane in gas for my generator, and it does the job perfectly.”

“In my truck, this stuff works great. It keeps the engine from knocking, and I'm really happy with the results.”

“I bought a four-pack of octanium, but unfortunately, all four bottles arrived dented with the lids off. Two bottles were only half full. I feel like I was ripped off buying this way.”

"I've been using 104 Octane Boost since I was 16, and now at 61, I still find it to be the best on the market. Many people opt for pricier brands, but they simply can't compare to 104's effectiveness and value. I'm thrilled that I can find it on Amazon!"

"After trying out several octane boosters, I can confidently say that 104+ is the first to deliver real results. The difference in throttle response and acceleration is noticeable, especially in Turbo V6 and V8 engines. It's not designed for flex fuel vehicles, but it truly makes a huge difference once mixed in."

"I recently started using this product in my vehicles, and I can feel the improvement in performance. I previously tried other octane boosters, but none of them made a difference like this one. It's also more affordable than others, making it a great choice for anyone looking for a reliable octane booster."

"I run this in my 2022 Maverick X3 Turbo RR. Sometimes I can't find premium fuel on the trails and my tune requires 93 minimum. It helps prevent fuel from going bad and has improved my fuel mileage. I can tell it raises the octane because there’s no timing being pulled. However, it does emit a soapy racing fuel smell that can be unpleasant for those behind me. Overall, a great product!"

"I've been using Klotz octane booster in my Harley Davidson 131 engine for years. When I add 3-4 ounces to a full tank of 93 Octane, I notice better throttle response and a smoother engine at all speeds, especially on the interstate. I definitely recommend this product!"

"I have a small crossover vehicle with a 2-liter engine and 11.5:1 compression ratio. This product really helps when towing or driving through the mountains; regular fuel makes it sluggish under load. I’ve noticed a significant increase in power and throttle response. However, I wouldn't buy it in a gallon container again due to the hassle of measuring and potential spills."

"I noticed a significant improvement in low-end torque with my turbocharged 4-cylinder engine, especially in hot and humid Florida."

"After using the Max-Boost Octane Booster, my GMC crate engine improved fuel efficiency, getting up to 14-15.5 mpg on the highway."

"I always use this product every 2000 miles, and my car's injection system runs noticeably better after treatment."

"I was thrilled to find this wonderful product that I desperately needed. The seller and Amazon ensured my order was filled quickly! The can arrived in perfect condition—no leaks and no bad smell. It's incredibly easy to use, and I appreciate the support for finding the right mix for my desired octane. Thank you, Boostane!"

"I purchased this product as a diagnostic tool after upgrading my turbo and ECU. I was experiencing a lot of knock, and I hoped this would help. While it didn’t solve my issue, it did indicate that my intercooler might be too small. The usage calculator was not helpful, as it only assumes 93 octane gasoline, but I found a useful chart on the bottle instead. Overall, it’s a decent product if you need higher octane fuel."

"This stuff does its job exceptionally well! I have a 2017 S550 Mustang with a 98 octane tune, and this was essential for mixing at the pumps. It’s a powerful octane booster, and although it leaves orange powder on the spark plugs, it doesn't seem to cause any issues. I’ve tried other brands, and this one definitely provides more octane boost!"