This is used for Marine Engines ie Mercury brand, in which they don't have o2 sensors. If your using it in a car, your wasting a ton of money vs STP or something and i will ruin o2 sensor on a car

Is this how they call quickleen lubricant

Hi too the best of my knowledge it is fuel system cleaner nothing more however it may have some lubricating qualities. I do know that it works well if you use it on a regular basis.I use quickleen 1 with every fill up along with stabil for marine use it helps keep the moisture out of the fuel system.

will this cleaner free up compression relies valves?

I use this more on the preventative side and not fixing carbon build up or other material build up. I do understand you can use a higher dose of this additive and run the engine at lower rpms to help eliminate some of the build up. All depends on how dirty your valves have gotten. I have been using this additive for the past three years or almost 1800 hours on my engine. I have never had any issues with build up.

Does it also act as a gass stabilizer for winter storage?

It is a fuel system and injector cleaner. I used Marine Stabilizer in my fuel tank for winter storage.

Marine Quickleen Engine And Fuel System Cleaner 12 Ounces 92

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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₩87257

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Sold byAmazon South KoreaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡ Power up your engine’s potential with Mercury Quickleen!

CARBON CRUSHER - Eradicates carbon buildup from carburetors, injectors, valves, and spark plugs to boost performance.
ENGINE GUARDIAN - Prevents knocking and piston seize-up, protecting your investment during every ride.
SPARK PLUG LONGEVITY - Extends spark plug life, reducing maintenance frequency and costs.
TRUSTED MARINE GRADE - Used by pros, with a 4.8-star rating from 784 reviews—quality you can rely on.
FUEL SYSTEM REVITALIZER - Treats up to 60 gallons for a deep clean that keeps your engine running smoother, longer.

Mercury Marine Quickleen Engine and Fuel System Cleaner is a professional-grade 12 fl oz treatment that cleans carbon deposits from critical engine parts, treats up to 60 gallons of fuel, prevents engine knocking and piston seize-up, and extends spark plug life. Highly rated by marine engineers, it ensures peak engine performance and longevity.

Specifications

ASIN	B003ZF1GJQ
Automotive Fit Type	Universal Fit
Best Sellers Rank	#84,259 in Automotive ( See Top 100 in Automotive ) #98 in Automotive Fuel System Cleaners
Brand	MERCURY
Brand Name	MERCURY
Compatible with Vehicle Type	Watercraft
Core Material	Platinum
Core material	Platinum
Customer Reviews	4.8 out of 5 stars 818 Reviews
Manufacturer	Mercury Marine Mercruiser
Manufacturer Part Number	8M0047931
Model Number	8M0047931
OEM Equivalent Part Number	8M0047931
Thread Size	RM
Thread size	RM
UPC	745061870192
Vehicle service type	Watercraft

Reviews

B**.

Works

Good product

2.08.2025

B**.

Best I’ve found in a fuel system cleaner.

Mercury Quickleen was recommended by local Mercury repairman with over 30 years of experience. He states that it outperforms Seafoam and even the other fuel treatments that Mercury has. After a clogged jet in one of my carburetors, I started using it. My outboard has never ran better. If you’re concerned about deposits in your fuel system, I really don’t think you can do better than this product and I intend to keep using it.

3.10.2026

K**N

Does what they it will do

This does exactly what they said it would do I put it in my motorcycle and it cleaned up the carb no it runs smoother and better good quality product so good I have bought 5 since my first one I bought

6.09.2026

R**.

This stuff works well.

Excellent product. Got my motor running in tip top shape. Goid value.

3.05.2026

T**T

How well it works!

Great product

19.09.2026

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Ali H.

Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

1 day ago

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Very impressed with the quality and fast delivery. Will shop here again.

4 days ago

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₩87257

Duties & taxes included

In stock

Sold byAmazon South KoreaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to South Korea.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Rajesh P.

Customer service was outstanding when I had questions about the product.

2 days ago

Imran F.

Very reliable shop with genuine products. Will definitely buy again!

2 weeks ago