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phoinix | Staff 10.8K Views
Apr 23, 2026 7:21 PM

5-Oz LIQUI MOLY Valve Clean

$8.00

$15

46% off
Amazon
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Deal Details
Amazon has 5-Oz LIQUI MOLY Valve Clean for $8. Shipping is free with Prime or on $35+ orders.Thanks to Deal Hunter phoinix for finding this deal.

About this item:
  • Better engine performance.Fit Type: Universal
  • Lower fuel consumption
  • Lower pollutant emissions
  • Protection against corrosion and carburetor icing

Editor's Notes

Written by Neo45 | Staff

Original Post

Written by phoinix | Staff
Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
Amazon has 5-Oz LIQUI MOLY Valve Clean for $8. Shipping is free with Prime or on $35+ orders.Thanks to Deal Hunter phoinix for finding this deal.

About this item:
  • Better engine performance.Fit Type: Universal
  • Lower fuel consumption
  • Lower pollutant emissions
  • Protection against corrosion and carburetor icing

Editor's Notes

Written by Neo45 | Staff

Original Post

Written by phoinix | Staff

Community Voting

Deal Score
+34
Good Deal
Visit Amazon

Top Comments

leeterbike
1.8KComments
455Reputation
Yes. Most modern direct injection engines will not clean with this as the fuel never touches the intake valves. Engines with port injection will have fuel cleaning them and not need cleaned unless you have some serious problems.
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texag09
552Comments
110Reputation
Yes and no. If you're trying to use it to clean dirty intake valves on a direct injection engine, then yes, total waste.

If it is an older vehicle with port injection, AND you're using poor quality fuel that doesn't have much detergent in it, then it might be useful. But if you use top tier fuel on a regular basis, probably not doing to do much.

And, even with direct injection, if you use non-top tier fuel, running this once every few thousand miles will help keep injectors slightly cleaner. Enough to fix a dirty injector, or fix a problem if one is already there? Probably not, but maybe enough to keep it from getting very dirty.
Go to Comment
ElatedPear129
176Comments
44Reputation
One needs to understand a little bit about valve cleaning to see why this product is next to useless. Your typical valve with years of carbon deposits will have to be SOAKED in cleaning solution for hours for the deposit to start dissolving. Another approach, which works 100%, the valve needs to be blasted with a soft abrasive product like crushed walnut shells. If anyone believes that 150ml of anything dissolved in 56,781ml of gas (15 gallons) will do anything to your valves - good luck.
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20 Comments

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Apr 25, 2026 12:33 AM
277 Comments
Joined Dec 2007
room209Apr 25, 2026 12:33 AM
277 Comments
slick price
Apr 25, 2026 1:19 PM
1.1K Comments
Joined Nov 2011
topshelf207Apr 25, 2026 1:19 PM
1.1K Comments
Aren't all these products(you add to the gas tank) a waste of money and don't actually do anything?
1
Apr 25, 2026 1:38 PM
1.8K Comments
Joined Sep 2014
leeterbikeApr 25, 2026 1:38 PM
1.8K Comments
Quote from topshelf207 View quoted comment :
Aren't all these products(you add to the gas tank) a waste of money and don't actually do anything?
Yes. Most modern direct injection engines will not clean with this as the fuel never touches the intake valves. Engines with port injection will have fuel cleaning them and not need cleaned unless you have some serious problems.
1
Apr 25, 2026 1:45 PM
176 Comments
Joined May 2023
ElatedPear129Apr 25, 2026 1:45 PM
176 Comments

Our community has rated this post as helpful. If you agree, why not thank

One needs to understand a little bit about valve cleaning to see why this product is next to useless. Your typical valve with years of carbon deposits will have to be SOAKED in cleaning solution for hours for the deposit to start dissolving. Another approach, which works 100%, the valve needs to be blasted with a soft abrasive product like crushed walnut shells. If anyone believes that 150ml of anything dissolved in 56,781ml of gas (15 gallons) will do anything to your valves - good luck.
Last edited by ElatedPear129 April 25, 2026 at 06:47 AM.
1
Apr 25, 2026 2:06 PM
338 Comments
Joined Dec 2005
yesyoucantApr 25, 2026 2:06 PM
338 Comments
Great deal for smaller engines (lawn mower, etc)
Apr 25, 2026 2:51 PM
1.9K Comments
Joined Nov 2013
killerloopApr 25, 2026 2:51 PM
1.9K Comments
Quote from ElatedPear129 View quoted comment :
One needs to understand a little bit about valve cleaning to see why this product is next to useless. Your typical valve with years of carbon deposits will have to be SOAKED in cleaning solution for hours for the deposit to start dissolving. Another approach, which works 100%, the valve needs to be blasted with a soft abrasive product like crushed walnut shells. If anyone believes that 150ml of anything dissolved in 56,781ml of gas (15 gallons) will do anything to your valves - good luck.
Valvoline Restore & Protect, 3 change cycles min IYKYK
1
1
Apr 25, 2026 3:46 PM
552 Comments
Joined Aug 2013
texag09Apr 25, 2026 3:46 PM
552 Comments
Quote from topshelf207 View quoted comment :
Aren't all these products(you add to the gas tank) a waste of money and don't actually do anything?
Yes and no. If you're trying to use it to clean dirty intake valves on a direct injection engine, then yes, total waste.

If it is an older vehicle with port injection, AND you're using poor quality fuel that doesn't have much detergent in it, then it might be useful. But if you use top tier fuel on a regular basis, probably not doing to do much.

And, even with direct injection, if you use non-top tier fuel, running this once every few thousand miles will help keep injectors slightly cleaner. Enough to fix a dirty injector, or fix a problem if one is already there? Probably not, but maybe enough to keep it from getting very dirty.

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Apr 25, 2026 3:48 PM
552 Comments
Joined Aug 2013
texag09Apr 25, 2026 3:48 PM
552 Comments
Quote from killerloop View quoted comment :
Valvoline Restore & Protect, 3 change cycles min IYKYK
Valvoline R&P won't clean intake valves. It might reduce buildup due to cleaning piston rings, decreasing blow by, and a few other things. But as far as I know, won't do anything for intake valve buildup.
Apr 25, 2026 4:20 PM
34 Comments
Joined Nov 2017
nutrientApr 25, 2026 4:20 PM
34 Comments
Just a reminder that there's a Direct Injection version of this too. I've seen people use the wrong one.
2
Apr 25, 2026 4:21 PM
1.4K Comments
Joined Nov 2017
spittlbmApr 25, 2026 4:21 PM
1.4K Comments
Holy moly it's liqui moly!
1
Apr 25, 2026 6:14 PM
8.9K Comments
Joined Aug 2009
AznCrackerApr 25, 2026 6:14 PM
8.9K Comments
Err if i throw a bottle of chevron in every 6 months, this won't do anything extra right?
Apr 25, 2026 10:40 PM
836 Comments
Joined Apr 2006
BorkApr 25, 2026 10:40 PM
836 Comments
Quote from ElatedPear129 View quoted comment :
One needs to understand a little bit about valve cleaning to see why this product is next to useless. Your typical valve with years of carbon deposits will have to be SOAKED in cleaning solution for hours for the deposit to start dissolving. Another approach, which works 100%, the valve needs to be blasted with a soft abrasive product like crushed walnut shells. If anyone believes that 150ml of anything dissolved in 56,781ml of gas (15 gallons) will do anything to your valves - good luck.
But if you have a new car that has port injection and don't normally use top tier fuel then using a product to keep valves clean has merit. Unfortunately this is probably not the product you want as it doesn't contain the same chemical as chevron Techron to work best.
Apr 26, 2026 4:03 AM
2.8K Comments
Joined Oct 2008
asukaApr 26, 2026 4:03 AM
2.8K Comments
Quote from texag09 View quoted comment :
Yes and no. If you're trying to use it to clean dirty intake valves on a direct injection engine, then yes, total waste.If it is an older vehicle with port injection, AND you're using poor quality fuel that doesn't have much detergent in it, then it might be useful. But if you use top tier fuel on a regular basis, probably not doing to do much. And, even with direct injection, if you use non-top tier fuel, running this once every few thousand miles will help keep injectors slightly cleaner. Enough to fix a dirty injector, or fix a problem if one is already there? Probably not, but maybe enough to keep it from getting very dirty.
All of this. I run a bottle of whatever's cheap on the last tank before an oil change. Run through that tank, then change the oil and filter.

While there's debate about the merit of that order (which I think there is at least some) it also makes sure you do it regularly alongside the oil change interval.
Last edited by asuka April 26, 2026 at 04:26 AM.
Apr 26, 2026 6:05 AM
71 Comments
Joined Dec 2023
MotherboardJaredApr 26, 2026 6:05 AM
71 Comments
Quote from leeterbike View quoted comment :
Yes. Most modern direct injection engines will not clean with this as the fuel never touches the intake valves. Engines with port injection will have fuel cleaning them and not need cleaned unless you have some serious problems.
Not to mention if you use top tier gas with a port injection car, they'll be plenty clean and free of buildup.

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Apr 26, 2026 6:07 AM
71 Comments
Joined Dec 2023
MotherboardJaredApr 26, 2026 6:07 AM
71 Comments
Quote from AznCracker View quoted comment :
Err if i throw a bottle of chevron in every 6 months, this won't do anything extra right?
Correct. Just do the Chevron complete fuel system cleaner every 6 months and that's plenty. Also make sure to use Top Tier rated gas.

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