The Ultimate Comparison Between Motorcraft SP515 Vs SP546


Motorcraft SP515 VS SP546

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Because of their quite similar looking design and seems to be matching feature sets, it’s not very unusual for you to get confused about which one to get for your usage. We are talking about the Motorcraft SP515 & SP546 variants.

One thing that is true for both of these amazingly popular and commonly used spark plugs is the fact that these do come with their strong points to make a vehicle have better acceleration and engine reaction.

And to mention their effort for enhancing fuel efficiency. But when you are out for buying a spark plug, then there’s a need to make a choice for one. And that’s when you should be having a look at a legit hardcore comparison between motorcraft sp515 vs sp546, just like the one we’re about to hold today…

Motorcraft SP515 Vs SP546

SP515 Spark Plug

SP546 Spark Plug

Core Material

Made out of copper materialMade out of platinum material

Thread Size

On average 16 mmOn average 14 mm

Suitable For

Most older vehicle enginesMost latest vehicle engines

Center Electrode Tip Material

Rough and tough platinum tip shellHigh endurance Iridium shell

Good For

Fine quality and accurate fit to make the most of performanceReliable one that gives good ignitability and long life execution

Price



###. Our Recommended Pick- Motorcraft Spark Plug SP546 Set– Get Worry-free Electric Work With This One


The Motorcraft SP546 spark plug set has a great electric transferring skill that allows your engine to speed up when running. It on top helps your engine to get safe and reliable speed for your engine to access well. Read down below to find the Motorcraft SP546 design specs:

Longer Lasting Performance

The Motorcraft SP546 spark plug set comes with a fine wire design that allows your engine to get good performance with no worn out snag. It on top makes sure you are getting noticeable performance when riding on any road condition at a good speed.

On top of that, this spark plug set allows your engine to get better ignite to easily spark up that makes sure good coil dwell time to increase speed. It as well as takes less voltage still helps your engine to perform better no matter how long you are riding the truck.

Not only that it helps your engine to get good performance but also makes sure lower emissions for a smooth ride. It also allows fine horsepower to flow when riding on the street.

Laser Welded Tip

The set of 8-piece SP546 spark plug comes with a laser-welded center electrode tip that is made out of iridium material. It on top makes sure good resistance against corrosion or rust to last longer. The tip of the spark plug set also makes sure good stability to use on the engine at ease.

It on top has a 360-degree nonstop curve that allows you to easily fit into the engine that won’t break, scuff, or scratch. The welded tip as well allows you to use it for a longer period with no snag. It on top makes sure better durability stand against opposition.

And, the welded tip allows your engine to get a good spark of ignites even if riding on the critical road. It also stays fitted that can resist impact.

Tough Nickel-Plated Shell

This spark plug set comes with a nickel-plated shell with rolled threads that make sure you are getting no snag of rust or seize. It on top has a thin layer that allows you to get easier feed. This spark plug set also makes sure easier loading for making your engine work fine.

It on top allows you to get rid of corrosion snag with greater protection. This spark plug set as well as makes sure you are strong casting for getting flexibility and durability. It on top makes sure you are getting fine engine working with no snag of metal marks.

Decrease Fuel Spending

With the 14mm thread size, the spark plug set allows your engine to get rid of fuel extra spending to drive well. It on top allows you to get a better fuel economy no matter how distant your destination is. This spark plug set also ensures higher gas mileage on the roadside.

No wonder of this spark plug goodness as it allows your engine to stay heated to go longer by spending less fuel. It on top makes sure your truck gasoline is also gaining for up to 10% to 20%. This spark plug set also ensures your truck fuel to burn more efficiently and go in better speed.

Smooth And Energetic Starts

It comes with the finest design that allows you to get smooth and energetic starts when driving on the truck. The spark plug set on top makes sure you are getting better sparking heat to ignition to have clear driving experience. It as well makes sure your car to avoid jerky starts.

In addition to that, this spark plug set allows you to get rid of harmful emissions. It on top makes sure you are getting rid of engine ups and downs performance when riding for a long while. This spark plug set also helps to avoid air pollution.

Tapered Ground Electrode

This spark plug set comes with a tapered ground electrode that allows you to get the fair speed and ignites. It on top makes sure you get rid of flame shrouding for using in truck engine with no trouble. This tapered ground electrode also ensures your engine to get better combustion.

And, we don’t stop there. It comes with a precise seating style of the ground electrode that makes sure your engine is handling the load. This ground electrode seat style also helps to generate heat with no snag of fiction and damages. It on top makes sure a better execution.

Pros:

  • This spark plug set helps your engine to perform well with zero maintenance and care.
  • It helps your engine to get heated to perform well no matter which weather you are using.
  • For the price rate and quality, it is hard to beat.
  • This spark plug set helps your truck to get rid of running super rough on idle.
  • It helps your engine to spark up for getting better acceleration and speed.
  • This spark plug set is easy to set up and removes from the engine.

Cons:

  • It comes with a fixed position gap.
  • Some people don’t like the quality of the set.

Available On Amazon

###. Our Second Best Pick- AD Auto Parts Motorcraft SP515 Spark Plug Set– Find Quality & Engine Action With This One


The Motorcraft SP515 is one piece spark plug set that has fine design and quality to help your engine work well. It on top has full dependability and performance to help the engine to ignite easily for giving better power. To learn well, here are some points of the SP515 spark plug set:

Corrosion Resistance Ability

This spark plug set is made out of copper that makes sure good resistance ability to stop rust and corrosion snag. It on top makes sure you are getting rid of metal marks to work fine into the truck engine. This spark plug set also ensures no snag of the temperature effect.

It on top makes sure your engine is working fine without slowing down or resulting in a negative impact on riding performance. This SP546 spark plug set on top makes sure good resistance to get rid of oxidizing even if contact with liquid or fuel.

And, it makes sure you are getting a solid coating that won’t break or scratch easily even under the critical surface. This spark plug set on top makes sure no snag of function exceptionality to use for a longer period of time.

Accurate Fitting

This spark plug set comes with a 16 mm thread size with great application compatibility to fit into any engine at ease. It also allows your truck to easily fit with no trouble of loose fit. Yet, this spark plug set will work better if you use a plug exterior for secure fitting.

It on top makes sure you are using in the latest truck with no trouble. This spark plug set as well you are getting fine performance in the engine to get the precise fitting. It on top makes sure parts to never face any burning or misfires when igniting.

Any Weather Application

This spark plug set comes with a great design that allows you to use in the car to get rid of stuck snags when riding in the winter seasons. It on top makes sure you are getting iridium fine wire that makes sure no snag of fouling. This spark plug set also allows good heated engine performance.

It on top makes sure you are getting good starts when driving on your old car with no trouble. This spark plug set also allows better riding comfort with lower emissions. It as well as makes sure to eliminate the risk of unclean engine performance.

Good Service Intervals

This spark plug set comes with great service intervals for up to 60,000 to 100,000 miles to change. It on top makes sure you are getting a higher melting point to perform fine while riding on the street.

Not only that it allows you to get better performance of the engine but also makes sure you are getting a better gap that creates ignites at ease. This spark plug set on top makes sure better resistance to drive well.

Enhance Acceleration & Response

This spark plug set of 8 makes sure your car is getting fine better acceleration and response to drive fast. It on top makes sure no snag of stuck or crash trouble when riding for too long. This spark plug set also ensures better speed up.

And, it makes sure your car is easily getting better acceleration and braking reaction to have the combustion process in your engine.

Smooth Engine Idle

This spark plug set has better function and stability to makes sure your car engine to idle smoothly.  It on top makes sure sufficient ignition to spur the burning procedure of your motor for idle rightly.

In addition, this spark plug set makes sure no faults when riding faster. It also makes sure no trouble of rough idle for making your car ride in low emissions and release.

Pros:

  • This spark plug set allows you to get a solid finish that will last for a long while.
  • It is quite easy to install that doesn’t take much time to fit into the engine.
  • One of the finest options for the Ford F150 truck engines.
  • This spark plug set allows your truck engine to get rid of excess fuel spending.
  • It is great for increasing your truck riding speed to run smoother.
  • This spark plug set needs less care and maintenance to use longer.

Cons:

  • Not a good option for 2004 Mercury Grand Marquis.
  • It requires a plug exterior to fit rightly.

Available On Amazon

Overall Thoughts

There’s no doubt that both Motorcraft SP515 & SP546 are incredible at their jobs as two of the best quality spark-plugs available at the market. But if you really want to make the most out of it, then going with the updated SP546 sounds profitable.

Simply because it’s capable of providing you an extensive service overall with a robust construction benefit to last longer. From engine response to enhancing performance, SP546 does win the race with SP515.

However, by no means this declares SP515 to be a bad choice. It’s still a valid option to try for vehicles with somewhat old engines. Ultimately, you should be making the choice, so do it!

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