Seafoam vs Lucas: Which Fuel Injector Cleaner Is Better?



You may or may not have seen the multitude of videos on YouTube of people using Seafoam to cloud their neighborhood in smoke. What you may or may not have realized is that this fuel injector cleaner is serving an important purpose that improves the longevity of a car’s engine.

Fuel injectors are devices that spray fuel, into your fuel system, from a very small nozzle. Over time, gasoline will leave carbon deposits in your engine and clog these crucial nozzles.

These deposits can decrease the efficiency of your fuel system and ultimately render it useless; this can decrease your engine’s horsepower and fuel efficiency.

Two popular products on the market, for removing carbon deposits from an engine, are Seafoam and Lucas fuel injector cleaner. Both products are similar but have key differences that we will cover here.We are now entering the battle of Seafoam vs Lucas.

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The Comparison

Seafoam SF-16 Motor Treatment

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Lucas 10013 Fuel TreatmentCheck The Latest Price

Both Seafoam and Lucas fuel injector cleaner can be poured into your vehicle’s gas tank. Additionally, the injector cleaners work in both gas and diesel engines. If your car is having emission issues, these fuel injector cleaners will both serve you well in making sure that your car is emission-friendly.

It is recommended that you add fuel injector cleaner to the fuel system after every 10,000 miles in order to keep the system clean.

Using both Seafoam and Lucas fuel injector cleaner is simple but both manufacturers have slightly different instructions.

A quick summary of the steps that each manufacturer has is this:

  • Place the fuel injector cleaner into your fuel system
  • Let the vehicle sit so that the cleaner can clean the system
  • Run the vehicle’s engine to remove carbon deposits and injector cleaner from the system

These steps, as mentioned above, will be specified by both manufacturers on their packages.

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Key Differences

Seafoam, in addition to your gas tank, can be placed in with your oil and still work just as effectively as if it were poured into your vehicle’s gas tank.

However, for the best results, it is recommended that you pour Seafoam directly into your vehicle’s vacuum line so that the treatment can reach the vehicle’s cylinders directly.

To get the best results from Lucas fuel injector cleaner, it is recommended that you pour the cleaner into your gas tank when your tank is near empty so that the injector cleaner can stay potent and undiluted.

For readers with vehicles that use diesel gas, an additional attribute of the Lucas fuel injector cleaner is that it can neutralize the effects of any low-sulfur diesel gas that you may unintentionally fill your tank up with.

As with diesel engines, Lucas fuel injector cleaner has superb compatibility with a wide range of vehicles.

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The Winner

In the battle of Seafoam vs Lucas fuel injector cleaner, we have to give Seafoam the championship belt due to its simplicity and cleaning strength. Seafoam is a customer favorite among many forums and automotive communities due to its price and benefits.

Although we prefer Seafoam to Lucas fuel injector cleaner, customers of both Seafoam and Lucas products were satisfied after using the cleaners. Many testify to having experienced improvements in their gas mileage and vehicle performance.

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Although using too much fuel injector cleaner will not harm your engine, excessive amounts may begin to wear your fuel system and fuel lines after an extended period of time.

It is best to follow the directions of whichever manufacturer you choose to keep your vehicle’s fuel system clean and get the best results from their products.

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