Reviews of LIQUI MOLY engine flush

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36 reviews and 112 votes

112 votes

Average rating ? The average rating is calculated only from review ratings, without votes
4.4
Idle smoothness:
4.3
Smoke change:
2.0
Drain appearance:
3.9
31
4
1

36 reviews

Description
LIQUI MOLY
Germany
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LIQUI MOLY Engine flush
  • Drain appearance:
Rating 5.0

I had a sludge problem. I did some research and came upon Liqui Moly. I did a fresh filter change and added the sauce. 200 miles later the oil came out Black As a Moonless Night. Bye-bye sludge! On another car, I used the L-M 2037 Engine Flush. Sludge-no-more. This stuff flat Works!

Pros: Bye-bye sludge!, This stuff flat Works!
Mileage: 322 km
Part number: 2037
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LIQUI MOLY Engine flush
  • Drain appearance:
Rating 3.0

I performed the engine flush using LiquiMolly over the weekend. Got the engine to operating temp, poured the can into the engine and let it stand idle for 30 min. I did notice some amount of what appeared to be sludge come out.

Pros: some sludge came out
Vehicle: Hyundai Sonata
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LIQUI MOLY Engine flush
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  • Drain appearance:
Rating 3.0

It does the job but don't expect miracles from it. I've seen it do decent work on severly gunked up engines. Nothing magical, but it did clean up the valve train a little.

Pros: clean up valve train
Cons: don't expect miracles
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LIQUI MOLY Engine flush
  • Idle smoothness:
Rating 5.0

Pretty sure it was Liqui Moly, anyway it made a world of difference. The oil change and flush knocked a full second off my quarter mile time.

Pros: made a world of difference
Vehicle: Audi S5
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LIQUI MOLY Engine flush
  • Drain appearance:
Rating 4.0

what have you tried so far? I had moderate success with Liqumoly Engine Flush, following directions on the bottle. At 100K miles, I went through 1qt after 4000 miles and i've cut it down to about half of that after the flush.

Pros: moderate success, reduced oil consumption
Vehicle: Volkswagen Tiguan
Mileage: 160000 km
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LIQUI MOLY Engine flush
  • Drain appearance:
Rating 4.0

Only Liqui Moly was truly effective. The ordinary English flush wouldn't remove the sludge. It will just make the oil very black.

Pros: truly effective
Cons: oil very black
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LIQUI MOLY Engine flush
  • Drain appearance:
Rating 5.0

I just used it last week. It pulled some nice chunks of sludge that the filter caught. Works on gas or diesel.

Pros: pulled nice chunks of sludge
Mileage: 48000 km
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LIQUI MOLY Engine flush
  • Idle smoothness:
Rating 5.0

Definitely buy a bottle of Liquid moly engine flush before oil change. It may not do miracles but it works wonders cleaning up the engine and maybe getting to the piston rings.

Pros: works wonders cleaning engine
Vehicle: Volkswagen
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LIQUI MOLY Engine flush
  • Drain appearance:
Rating 4.0

Liqui Moly engine flush can be beneficial if used from new to help resist oil crust building up in the oil control rings

Pros: resist oil crust building
Vehicle: Volkswagen
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