Best Fuel Additives of 2025

"I've been using Lucas Oil Fuel Treatment for years. My MPG jumped from 30-31 to 36 after using it. The 1-quart version is cost-effective and reduces waste. This product has become a staple in my maintenance routine."

"I use Lucas in every tank. Just 3-4 oz. per 20-gallon tank makes a noticeable difference in MPG, and the throttle response and power increase are addictive. It even keeps my fuel system clean, which I love!"

"I add Lucas Fuel Treatment to everything I own, from my C8 Corvette to my boat. I value it mainly for its upper cylinder lubrication. It works well alongside SeaFoam Marine for cleaning and stabilization."

"For less than $10, I find it essential to stabilize my fuel during the winter, especially since I don't do yardwork regularly. This product is absolutely excellent and a must-have for any homeowner."

"I've been using it for years in my boat fuel tanks and 5-gallon fuel jugs that sit around for months. It works well in both 85% or 100% gasoline mixes. Great price and fast delivery!"

"I usually prefer to purchase supplies like this from my local motorcycle shop, but in a pinch, this is a fantastic option. It works perfectly for winterizing my motorcycle and keeps the fuel fresh through the off-season. The price on Amazon is a bit higher than what I'd pay at my local shop, but it's still a solid buy. Overall, I'm very happy with this purchase!"

"I've discovered that this product works even better than expensive octane boosters I've tried. Although it's labeled as a fuel stabilizer, fuel treated with Star Brite StarTron feels like higher octane fuel. In California, where we can only find 91 octane pump gas, I've noticed that StarTron-treated fuel performs even better—no pinging with A/C on and improved mileage."

"This is a fantastic product. It effectively keeps gasoline clean and prevents water from entering the system. I've even noticed a performance boost. I also apply it to smaller engines to keep them well-lubricated, and I plan to keep purchasing it."

"I’ve faced numerous issues with old gas clogging carburetor passages due to fuel degradation. This product is highly concentrated, so just a little treats a lot of gas. I use this treated fuel in all my small engines—chainsaws, blowers, pressure washer, and more—without any spring startup problems."

"This stuff works well. I use it on my motorcycle during winter."

"I was skeptical about this product initially, but after using it in my 2020 Ram, I noticed the gas pedal delay was gone. It runs great now!"

"After adding this product to my RV's gas tank, I followed the directions and saw improvements. I believe this is the best option for stabilizing fuel!"

"I've incorporated Chevron Techron Concentrate Plus into my car maintenance routine, and it's been fantastic. The cleaning efficiency is impressive, as it removes carbon deposits effectively, leading to a noticeable boost in fuel economy. My engine runs smoother and has better acceleration now."

"After seeing great recommendations for turbo vehicles, I decided to try this product. It definitely made my engine feel smoother and reduced the stutter during idle. I'm pleased with the results, and I think it's a worthy addition to my maintenance routine."

"I faced a frustrating issue with my C6 Z06 fuel gauge getting stuck. After using Techron Concentrate Plus, I saw a significant improvement. Not only did it resolve the gauge problem, but my engine's responsiveness and power also increased noticeably. I highly recommend this cleaner for any fuel system issues!"

"I found this to be one of the few additives that actually absorbs water effectively. It makes any residual water in my tank combustible, which is exactly what I need."

"I've been using this stabilizer for my lawnmower, weed eater, and chainsaw. My husband did his research and said it's way better than other brands."

"I was a bit unsure at first, but after using it with my two-month-old preserved gas, my chainsaw ran great! A trusted mechanic recommended it after extensive tests, so I'm feeling confident."

"After using this product, my SUV runs much better. I highly recommend it!"

"I initially bought this by mistake for my lawnmower, but once I used it in my car, I was surprised! My car accelerated like greased lightning and my gas mileage improved significantly!"

"I have older vehicles not designed for ethanol gas, and this product seems to protect them from ethanol's harmful effects. It's a valuable addition for keeping my classic cars operable."

"I have an older Honda that runs great, but I want to keep the engine clean and happy. Using this product during fill-ups gives me peace of mind knowing my engine is performing optimally. It's much cheaper than a new valve job!"

"After using this, my 99 Mercury Cougar runs really smoothly. I haven't noticed a change in gas mileage, but that's okay with me!"

"My dealership recommended this to enhance gas performance and clean fuel injectors. Following the instructions, I've noticed my car truly loves it after just a few fill-ups!"

"I use this product in my gasoline for minibikes and in alcohol for my strip; it works just like it should!"

"With my classic car, I noticed it used to smell like exhaust when I pulled it in and out of the garage. After using this product, I only get a faint sweet smell instead of the horrible exhaust. I'm very pleased!"

"After trying this at a race track, I decided to use it in my mower, blower, and weed whacker. It really masks the fumes, making my chores more enjoyable. Just a little goes a long way! Just a tip: wear rubber gloves when pouring it!"

"I used half a bottle on an almost empty tank with high octane gas in my Nissan Altima, and it's running like new! The pickup has greatly improved! 10's."

"After watching several videos on fuel cleaners, I decided to try Rislone for my sluggish 2018 RX 350L. In the first mile, I felt the difference in acceleration! After about 175 miles, my car runs like new!"

"With 117,000 miles on my 4-cylinder car, I added this product to my almost empty gas tank. After about 100 miles, I noticed a significant increase in power! It accelerates like it did when it was newer. This stuff works!"