Liqui Moly 2030 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. The bottle is easy open, the spout included makes it easy and quick to put in. The smell of it is ok, not too bad. Came in a baggy away from the other products shipped with it. They really made it simple to use, the aluminum can feel of the bottle its in feels nostalgic and durable. The product pours in clean, thanks to the funnel/spout. Makes easy work out of it when pouring it into your tank.

Great quality special for European cars

Good product. It works!

I use Liqui Moly once a year to help keep my injectors functioning properly. So far so good. I also clean the MAF sensor if I see a drop in mpg's.

All Moly products is the best

I have a 2021 Ford F-150 with the 3.5L Twin Turbo engine and over 100,000 miles. Recently, the truck just wasn't running as smoothly as it used to—the idle was a bit rough and the overall performance felt slightly off. I decided to try the Liqui Moly Pro-Line 2030 because it's a stronger professional formula. I poured it into the tank, and within about a week of driving, I noticed a clear difference. The rough idle smoothed out significantly, and the engine performance feels much tighter and responsive again. If you have a turbo truck hitting higher mileage, I highly recommend this over the cheaper additives. It definitely did the job for me.

Listen, I’m not one to leave reviews. I don’t bother doing it. However, I am so impressed with this product that I have to tell somebody. I just purchased a 2024 Palisade. I’ve been getting pretty good gas mileage averaging around 24 miles per gallon. I wanted to take good care of this vehicle and try to get to last as long as possible. So after 40,000 miles I put one can of this fuel conditioner. And I left my house and I drove 20 miles. Unbelievably my gas mileage increased 6 miles per gallon! Can you believe this? It happened to me and I can’t hardly believe it. Anyway, like I said, I’m really impressed with this and I will use it often. If it works is good for you as it does for me then this is worth every single penny to use it regularly.