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Liqui Moly

Liqui Moly Pro-Line Engine Flush | 500 ml | Oil additive | SKU: 2037

  • Based on 8,602 reviews
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Availability: In Stock.
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Arrives Tuesday, Aug 5
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Size: 500 mL


Features

  • Easy way to clean and flush the oil systems of gasoline and diesel engines
  • Gentle and rapid cleaning
  • Neutral to seals and other materials installed in the engine
  • Compatible with catalytic converters
  • Simple to use

Description

Liquid Moly's Pro Line Engine Flush is a highly effective detergent additives in Engine Flush clean interior engine before oil change. Removes Deposits, residues from all 4-stroke gasoline engines and diesel engines. Dissolves sludge and lacquer and isolates solid particles and liquid contaminants. Improves the combustion process and restores full engine performance. Prevents corrosion of unprotected metal surfaces. Recovers oil lubricating properties. Add to engine oil before engine oil change. Let engine run on idle speed for 10 minutes. Drain oil, change oil filter and refill with fresh Liquid Moly engine oil. Fully compatible with all commercially available engine oils.

Viscosity: 5W-40 sae_grade


Brand: Liqui Moly


Vehicle Service Type: Bus, Truck


Flash Point: 63 Degrees Celsius


Automotive Fit Type: Universal Fit


Viscosity: ‎5W-40 sae_grade


Brand: ‎Liqui Moly


Vehicle Service Type: ‎Bus, Truck


Flash Point: ‎63 Degrees Celsius


Automotive Fit Type: ‎Universal Fit


Global Trade Identification Number: ‎77


Manufacturer: ‎Liqui Moly


Size: ‎500 mL


OEM Part Number: ‎2037


Model: ‎2037


Item Weight: ‎15.2 ounces


Product Dimensions: ‎2.76 x 2.76 x 7.99 inches


Country of Origin: ‎Afghanistan


Item model number: ‎2037


Is Discontinued By Manufacturer: ‎No


Manufacturer Part Number: ‎2037


Date First Available: April 25, 2012


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Tuesday, Aug 5

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Top Amazon Reviews

    • Worked for me! Definitely recommend!
Size: 500 mL
Used a whole can in my 2009 Civic 1.8L with 150k miles. I can honestly say, this helped remove a lot of sludge out of the engine. The oil came out with a water-like texture and super dark! Before taking out the oil filter, I added new lower cost oil to the engine and let the engine run for about 5 minutes to get that extra flush! You can definitely see all the extra sludge in the new oil! Drained and refilled with new oil and filter. The engine definitely sounded quieter and smoother than before! If you value your car, I would definitely recommend doing this flush on your higher mileage cars every 50k miles or so! Definitely recommend this LiquiMoly product! ... show more
Reviewed in the United States on May 11, 2025 by T. Lee
    • Awesome Product!!!
Size: 500 mL
This stuff immediately solved my issue with a misfire on cylinder 4 due to a clogged filter (in the engine block) which feeds the MultiAir system on a Fiat 500. I had tried replacing plugs and coils before someone online recommended this product and I’m so glad they did! Ran it through the oil for 15 minutes, drained (came out black), filled with fresh oil and ran for another 15 minutes before draining (drained black a second time), then replaced the standard oil filter and filled with fresh oil. I have purchased the new engine block oil filter for the MultiAir system but since it requires lifting the engine slightly to replace I have been putting it off and this product was a huge time saver! ... show more
Reviewed in the United States on July 4, 2025 by SuperX
    • Quality
Size: 500 mL
Worked great. Cleaned internal engine very efficiently.
Reviewed in the United States on July 13, 2025 by Mo
    • Tips and tricks
Size: 500 mL
I watched several videos by professionals who used this. Follow instructions. Make sure the engine is warm before you put it in. Make sure you have everything you need. The biggest tip I got that was repeatedly emphasized by the pros was to buy a “cheap” oil in addition to the new oil. After you run the flush drain the oil and flush. Put the cheap oil in and “rinse” the inside of the engine with the cheap oil. Then drain again. Replace the oil and filter with your good stuff. I followed these instructions or suggestions and…. I sat in the truck while the flush was running. It’s a 13 year old truck with 150,000 miles. It was running strong but burning oil and kind of loud. Sounded like it was growling. There were some ticking type noises that made me nervous. As I sat in the truck and let the flush cycle through the engine at idle I could literally hear the flush working. Very slowly it was like someone gave the engine a Xanax and you could hear it getting quieter and calming down. I drained, rinsed with cheap oil only letting the cheap oil run through at idle for another 15 minutes then drained again. The oil flush was clearly important. It didn’t come out as black as the first drain but it looked like old nasty oil. The truck is no longer burning oil. My gas mileage has increased significantly and it is running so quiet and smooth it’s unbelievable. I used a little less of the liquid Molly flush than it called for regarding the flush to oil ratio. I didn’t want to do something too intense to the inside of the engine. But the results were remarkable. Just as advertised after following the instructions. I also added the liquid Molly oil additive to the final oil change to ‘lube’ the inside of the engine. I plan to do another flush in about 10,000 miles. All that to say, yes, you won’t be disappointed as long as you follow instructions and a few tips and tricks. My truck is almost running like a brand new truck and again it’s an old and tired truck. I will use this as part of a high mileage maintenance and perform the flush every 50,000 miles or so. I feel confident it will extend the life of my engine based on the results ... show more
Reviewed in the United States on February 9, 2024 by J N Brown
    • Works Good 👍🏼
Size: 500 mL
Works Good 👍🏼
Reviewed in the United States on January 12, 2025 by jacqueline huel
    • Won’t regret it.
Size: 500 mL
Great engine cleaner! I used half a bottle, drove 1k miles and did a oil change and the filter was filled with sludge and deposits. Going for the other half of the bottle and another 1k miles and will see results then! Really, really good stuff if you run it with each oil change.
Reviewed in the United States on June 4, 2025 by Bryson Wallace
    • Use of this product is a good idea to help minimize sludge buildup.
Size: 500 mL (Pack of 2)
Seems to have done a great job of cleaning my engine based on how dark the used oil was when I drained it, I believe I will continue using it at least once a year to help minimize sludge buildup.
Reviewed in the United States on July 17, 2025 by Paul
    • Used as directed, it works great!
Size: 500 mL
This stuff worked GREAT...! I bought an OLD mahogany boat - 1950s inboard. It ran, but engine oil was black with sludge. I used Liqui-Moly as directed, then replaced with new oil. The new oil was almost transparent on the dipstick. Would definitely recommend...
Reviewed in the United States on July 27, 2025 by Blake

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