Liqui Moly2030 Pro-Line Gasoline System Cleaner, 500 ml, 16.91 Fl Oz (Pack of 1)

I’ve now used LIQUI MOLY Gasoline System Cleaner on all three of my cars with over 80,000 -170,000 miles—and the results speak for themselves. I have a 2004 Mercedes ML350, a 2012 Hyundai Elantra Limited, and a 2016 Lexus RX350. This product has helped each one run more smoothly and efficiently, even at their age and mileage.Mercedes-Benz ML350 (W163):With a high-mileage V6, this SUV had started feeling a bit sluggish—especially on cold starts and uphill acceleration. After using this cleaner, the throttle response improved noticeably, and the idle became more stable. It didn’t suddenly turn into a new engine, but it definitely felt less bogged down and more responsive, especially at low RPMs.Hyundai Elantra Limited (2012):This car showed the most fuel economy improvement. Before use, I averaged 25–27 MPG. After running a full tank with LIQUI MOLY, it bumped up to around 30 MPG, and the engine felt smoother under load. It’s a small gain, but for a daily driver with over 86k miles, that kind of improvement adds up over time.Lexus RX350 (2016):This engine was already running well, but I use the cleaner bi-annually as preventive maintenance. I noticed slightly better responsiveness when accelerating, especially from a stop. It’s subtle but definitely there. I believe using this regularly helps prevent future build-up and keeps things running optimally.Important Note:These products aren’t magic potions that make your car run like new—but they do help clean and restore your fuel system over time. I use it as part of my bi-annual maintenance schedule. Combined with using high-quality gasoline and regular servicing, this cleaner helps keep all three of my high-mileage cars running smoothly and reliably.Bottom Line:LIQUI MOLY is a well-engineered, trusted brand, and this cleaner has proven itself across three different engines. I highly recommend it—especially if your car has 100,000+ miles. It’s affordable, easy to use (just pour it in before filling up), and makes a real difference when used consistently.

Works great I’ve never felt my truck run this smooth and accelerate so easily I’ve honestly had to get used to easing off the gas since using this.

We sell the standard version at my p/t job, but I had read this was better, so I gave it a try. Our 9 year old Pathfinder was experiencing a bit of hesitation even after changing the plugs and coil packs; having around 140,000 miles I decided to try a high quality fuel treatment as the last step. I added to 17 gallons of fuel and it was running perfectly within a few days! I can definitely recommend this to anyone as part of their maintenance routine!

The bottle is simple to pour and one container treats a full tank. Used it as routine maintenance and had no issues during or after use. The car seems to run smoothly, but it's hard to tell how much of a difference it made after just one treatment.Nice to have as part of regular fuel system care, especially since it’s from a trusted brand. May need repeated use to really notice long-term benefits

This product works. I run it in my 2017 Audi Q5 and my wife’s 2019 Jeep JL. I will use once a year to help maintain our fuel system in both vehicles. Using this in conjunction with valve clean and the jectron. Helps keep our vehicles running amazing all year long. My suggestion would be to use this once a year and to use the VALVE CLEAN cleaner they make every other fueling and use their JECTRON/DI JECTRON product 2-3 times a year. For my wife’s jeep, I use this complete fuel system cleaner, and JECTRON the most. keep in mind these are preventative products and can help when you do have carbon buildup, but the best investment is to use this before you ever have a problem. Since my wife’s jeep has a port injected motor these treatments work especially well at keeping carbon buildup from being an issue, if you have an Audi like mine that is direct injection this cleaner along with DIJECTRON is your go to. Keeping carbon buildup at bay will help with the longevity of your motor and your investment. It’s very easy to use worth the money and cleans especially well.

I can't fully dump all the content to the gas tank of car, quite some remains in the can. Easy to use, I just pour the content into half tank of gas then refill the tank, my 20 years old car runs slightly better after using it. Poor(or no) manual printed on the can, just couple of words in the website.

Got this to pour into my 2003 Honda element which is at almost 200k miles. Heard good things about this product. And the fact that it’s worth pouring into a car with higher miles.Really easy to use and quick.

With the usual stock of High Millage Seafoam being out everywhere I looked, I sought an alternative. Luckily M539 recommends many of LiquiMoly's products, so I felt like I could trust this one. Thus far, seems to have done the trick. I'm noticing my engine running smoother and quieter. Worked pretty fast too, just a single tank of gas is all it took. (so roughly 300-400 miles) And the can itself is very convenient, with the included gas spout.