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.

I drive a f30 340i, used to have rough idle until i used on bottle of this. the idle is smooth as butter.

Purchased this Fuel System Cleaner with a dual purpose:to clean the fuel systemto clean the catalytic converters on my Jeep after a repair work, as one converter was contaminated with a coolant-oil-soot mix after a Cylinder Head GASKET failure.Used : about 2/3 of the can in the fuel tank (less than 1/2 full) of the Jeep and the remaining 1/3 of the can in the fuel tank (less than 1/2 full) of one small older car, with engine hesitations after startup.Drove each one of them for a few days in a row, until tank empty.Didn't take long driving to notice a smooth change for the better and more responsiveness to the accelerator pedal. It was like the engine was running better day after day after day.Note: Best to do it is to take the vehicle for a longer highway drive, with the engine and the catalytic converters fully warmed up, so that the Cleaner can properly work its magic.Ever since, either vehicle feels like it wants "to fly" (aka: drive faster and faster).Definitely I will recommend this product to my friends and neighbors. And definitely it is well worth trying it, before going for expensive diagnostics and repairs.

Used this for my 2017 BMW 440i GC and I noticed it working right away. I had a sluggish throttle response from a stop and as soon as I used this I noticed a difference in the exhaust note at idle and took it for a little drive to let this work it's way through the fuel pump,filter, and the injectors. 5 minutes into the drive I noticed a more consistent throttle response and a better sounding exhaust note on deceleration and downshifts. Much smoother from a stop now. My wife said she noticed the difference too. Good product.

Great , L Moly makes great products, sisters 10year old car got a weird engine code related to gas and running rich or lean, I sent 4 bottles of this to her and told her to use is back to back, well the engine code is gone, so it was dirty gas or dirty injectors or dirty valves , every 10,000 miles I normally try to use 2 bottles back to back of this cleaner or other cleaner driving at highway speeds on long trip to clean everything out ( normally gas in the US and gas from quality gas stations already have cleaners in them, but it never hurts to keep the system clean, way cheaper than a mechanics bill )

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.

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

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!