Lucas Oil 10003 Fuel Injector Cleaner 32 oz. Automotive Additive
Lucas Oil 10003 Fuel Injector Cleaner 32 oz. Automotive Additive
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Lucas Oil 10003 Fuel Injector Cleaner 32 oz. Automotive Additive

4.8 stars out of 934 reviews
(4.8)|
934 ratings

Key item features

  • Size and Composition: Size: 32 oz. Blend of heat resistant, super slick oils and additives with a high detergent action that cleans and lubricates the fuel system.
  • Fuel Efficiency: Causes fuel to burn more efficiently for greater fuel economy and fewer emissions.
  • OEM Replacement: Replaces OEM Number: Lucas Oil 10003.
  • Versatile Use: Formulated for both gasoline and diesel engines, carbureted or fuel injected.
  • Engine Performance: Cleans and lubricates the carburetor and injectors, allowing the engine to operate at maximum efficiency.
  • Emission Control: Helps pass smog tests by causing fuel to burn more thoroughly for increased power and less fuel consumption.
  • Diesel Compliance: Neutralizes harmful effects of low sulfur diesel fuel and complies with federal low sulfur content requirements.
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Current price is Now $11.59
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was $12.99
36.2 ¢/fl oz
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4.8 out of 5 stars
stars934 ratings341 reviews
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Reviews summary

Pros
  • : Offers lower cost per treatment.
  • : Increases vehicle fuel mileage.
  • : Provides additional fuel efficiency in various driving conditions.
  • : Helps keep them clean.
  • : Increases by 20% or more.
  • : Provides better fuel efficiency and increased power.
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Showing 1-3 of 341 reviews

Feb 1, 2026
edward
Item details
Multipack quantity: 1
5 out of 5 stars review

Verified Purchase

helps with emissions CEL in older cars

have used lucas gas treatment in my older vehicles for years now. ethanol fuel seems to set off emissions sensors in 2 of my vehicles. i put lucas in the gas and the sensor CEL goes away. if you have older vehicles, this may help with emissions sensors. my old chevy also seems to idle a little smoother when i use lucas. will def continue to use in my older cars.

Helpful?3GCEB4V1FX0616777813
Dec 3, 2025
Deneen
Item details
Multipack quantity: 1
5 out of 5 stars review

Verified Purchase

I have a Jeep grand Cherokee 2004 I've been using this for years. I have almost 200,000 miles on it. This stuff has been great. It it really does help the grade of fuel that you put in your vehicle. I've had no problems since using it and my fuel last a lot longer, so I start investing in the larger bottle because by the time I buy two small bottles to treat my gas, it only makes sense to buy the larger bottle, especially if you have a old vehicle no matter what the fuel some of this fuel out here is watered down and we all know that sometimes we have to stop where we don't wanna stop and it could cause your vehicle to run funny so please invest in this. It's a very great product.

Helpful?3GCEB4V1FX0616777813
Dec 8, 2025
Walmart customer
Top Reviewer
Item details
Multipack quantity: 1
5 out of 5 stars review

Verified Purchase

Been using it for years off and on between marvel mystery oil and this, depending on which one was cheaper at the time. I've never had a problem with it. Using it in in a 21-year-old vehicle with 175,000 mi. I've always used it. I just put in 2 oz every time I get 10 gallons.

Helpful?3GCEB4V1FX0616777813

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