Reviews of LIQUI MOLY oil additives

PR Score ?

Based on 25 reviews and 76 votes

76 votes

Average rating ?

4.6

Engine noise:

4.6

Smoke:

4.8

Response:

4.3

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25 reviews

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LIQUI MOLY

Germany

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LIQUI MOLY › Oil additives

Motorhead#362 7 Aug 2025, 12:46

Rating 5.0

Engine noise:
Response:

I 've been changing the oil at 1000 miles first, after break in,on every new car i've owned since 1982(bought 20 new cars & trucks) without ever having an engine issue with any vehicle that i have owned. After that, depending on your driving habits, 3-5K internals. *Liquid Moly Engine Flush *Liquid Moly 0W-30 Premium Synthetic *Liquid Moly Ceratec oil additive

Pros: no engine issues

Vehicle: Ford Mustang

Mileage: 1000 km

LIQUI MOLY › Oil additives

Single_Money_535 5 Jul 2025, 05:04

Rating 5.0

Engine noise:
Response:

Made my 09 Hyuandai fast, .1 fuel eco. Engine 90% quieter under high load.

Pros: fast, quieter engine

Vehicle: Hyundai

LIQUI MOLY › Oil additives

CarpeCyprinidae 24 Apr 2025, 09:10

Rating 4.0

Engine noise:
Response:

Liqui Moly is the one that has some sort of scientific backing for it; During WW2 it was found that adding Molybdenum to oil significantly reduced engine damage in aircraft engines that had experienced oil loss in combat situations but been landed safely. I am currently trialling it in my 27y/o Saab and can report a reduction in engine noise and slightly smoother revving.

Pros: reduction in engine noise, smoother revving

Cons: makes oil look dirty

Vehicle: Saab

LIQUI MOLY › Oil additives

Swaytastic 13 Apr 2024, 11:48

Rating 5.0

Engine noise:

I add 1 bottle of mos2 to my 5.7 hemi in my 2008 ram after every other oil change and just send it until the next change. Extremely noticeable different in engine noise and operation.

Pros: noticeable difference in engine

LIQUI MOLY › Oil additives

VirusAffectionate396 11 Apr 2024, 22:48

Rating 5.0

Engine noise:
Smoke:
Response:

Liquid molly & ceratec additive is better than any bs blends a shop will sell you

Pros: better than blends

LIQUI MOLY › Oil additives

woobiewarrior69 14 Mar 2024, 16:49

Rating 5.0

Engine noise:

I use that exact additive in my hemi, and it's noticeably quieter.

Pros: noticeably quieter engine

LIQUI MOLY › Oil additives

sludmurda 14 Mar 2024, 14:08

Rating 5.0

Smoke:

I used liquid moly oil additive after I changed my spark plugs and coils and it helped my car from smoking after just one can.

Pros: helped car from smoking

LIQUI MOLY › Oil additives

permareddit 13 Mar 2024, 16:31

Rating 5.0

Engine noise:
Response:

I’ve used this very additive and it made a large difference in how smooth the car ran.

Pros: smooth car running

LIQUI MOLY › Oil additives

The_Real_Profess0r 27 Feb 2024, 11:56

Rating 5.0

Engine noise:
Response:

They work and they're worth it if you have a car you plan to keep for a few years to come.

I use the oil additive every oil change + Injector Cleaner regularily.

Major difference - Engine is quieter and much more lively than when I first bought my used car!

Pros: Engine is quieter, more lively

LIQUI MOLY › Oil additives

sterlingpenick 3 Jul 2023, 03:33

Rating 5.0

Engine noise:
Response:

I just put a can in my old mustang engine and it’s never felt so tight and smooth. Definitely good for older engines!

Pros: tight and smooth

Vehicle: Ford Mustang

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