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 938 reviews
(4.8)|
938 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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4.8 out of 5 stars
stars938 ratings342 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 342 reviews

Dec 3, 2025
Deneen
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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
Oct 21, 2025
Rachel
Top Reviewer
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Multipack quantity: 1
5 out of 5 stars review

Verified Purchase

Excellent Fuel Additive That Really Works!

I recently purchased the Lucas Fuel Additive and have been very impressed with the results. After using it, I noticed an immediate improvement in how smoothly my vehicle runs. The engine feels more responsive, and it seems to start easier and idle better than before. The product is simple to use — just pour it directly into the gas tank — and it gives noticeable results after just one or two uses. It also helps clean the fuel system and improve overall performance, which is a big plus for keeping the engine healthy in the long run. I really appreciate that Lucas products are consistent and dependable, and this fuel additive is no exception. It's a great value for the quality and performance it provides. I highly recommend this to anyone who wants to maintain their vehicle and get better mileage and smoother driving.

Helpful?3GCEB4V1FX0616777813
Aug 31, 2025
Walmart customer
Top Reviewer
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Multipack quantity: 1
5 out of 5 stars review

Verified Purchase

LUCAS tends to be a Very Fine Product

I use several LUCAS products over a wide range of vehicles (if its applicable). Cars through Construction Equipment and Commercial Heavy Trucks for several years. I own older mostly used vehicles and use THIS on all of them typically once a year by dosing consecutive tanks of gas until its gone (I have two of their single use bottles I refill). It gives me noticeably better mileage, power and responsiveness.

Helpful?3GCEB4V1FX0616777813