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Best Spark Plugs for 6.0 Chevy – Expert Review and Guide

By Kencoul

When upgrading or replacing stock parts, certain engine components are taken for granted, not only because of their low cost but also because of their no advertised gain in power when they're replaced. But that doesn't mean these components are any less important. Take spark plugs, for instance, instrumental in the most basic yet significant process in the engine (combustion), spark plugs play an important role in the way your truck performs. And if it's time to replace the spark plugs in your 6.0 Chevy, you've found the right resource. In this feature, we look at the Best Spark Plugs for 6.0 Chevy.

ACDelco -12680072 41-110 Professional Iridium Spark Plug (Pack of 4)

6 PCSNEW -- DENSO #4511 PLATINUM T T Spark Plugs -- PT16TT

NGK # 1465 Laser Iridium Spark Plug IZTR5B11 --- 8 PCSNEW

Bosch 6704 Platinum Spark Plug for Select Buick, Cadillac, Chevrolet, GMC, Hummer, Isuzu, Oldsmobile, and Pontiac Cars, Trucks, Vans, and SUVs (Pack of 1)

E3 Spark Plug E3.54 Automotive Spark Plug, Pack of 1

Entire manufacturer-recommended spark-plug interval; check with seller

Best Spark Plugs for 6.0 Chevy – Expert Review and Guide

ACDelco -12680072 41-110 Professional Iridium Spark Plug (Pack of 4)

  • Iridium offers better engine idle stability and smoother performance
  • Iridium allows for smaller, more efficient electrode designs for improved cold starting and quicker acceleration
  • Iridium fine-wire electrode helps improve ignition of the fuel and burns away carbon deposits on the tip of the plug as they form, to help improve fuel economy
  • One piece suppressor seal blocks radio frequencies that can affect vehicle electronics
  • Suppressor seal meters spark energy for longer electrode life and seals against combustion leakage

ACDelco is a well-known brand when it comes to genuine stock-replacement products. But with the Iridium spark plug, it goes a level ahead by offering something that's not only better than the stock/factory item but also offers huge improvements in comparison to rivals. Depending on the requirements, you can either pick up a pack of four or single units. We've included the link to the pack of four spark plugs here.

Due to Iridium's inherent properties, the spark plugs offer some improvements over standard plugs. Some of the common benefits of using an Iridium spark plug include better performance (both throttle response and economy can improve), lower stress on the ignition system, improved overall life, and slightly reduced emissions. Apart from the aforementioned points, the ACDelco Professional Iridium Spark Plug also comes with a one-piece suppressor seal that combats combustion leakage and stray radio frequencies. It's said to improve the electrode life as well. For these to work optimally, you'll need to keep a close eye on compatibility and refrain from tampering with the plug or gap.

The ACDelco Professional spark plugs come from a wide range of products sold as original/factory replacement for GM vehicles. It's made for the 6-liter Chevrolet V8 available in a variety of cars and trucks. The 2015 - 2019 Chevrolet Silverado 2500 HD and 3500 HD are compatible. These plugs can also be used in the Suburban 3500 HD with the same engine (2016 - 2019); the Caprice (2015 - 2017); and the Express 2500, 3500, and 4500 (2015-2019). ACDelco backs the product with a 7-year warranty and unlimited mileage. Check with the seller about both the warranty and compatibility to have a better idea. Users appreciate the high-quality of the plugs, which can be reflected in the way their Chevrolet/GMC vehicles run after installing these.

  • Good stock replacement
  • Improved response

Denso uses a better material (than regular plugs) in its Platinum TT spark plug. With platinum, not only is electricity conducted better, allowing for improved combustion, but it proves to be resistant to corrosion as well. That ensures a consistent spark performance over its life-a fairly long life- said to be upward of 60,000 miles.

The factory-replacement spark plug comes with a superior 'twin-tip' technology. With that, the spark plug offers better ignition and thus improved combustion. It also means the Denso plug will last longer and the performance is improved - both in terms of engine response as well as gas mileage. The use of Platinum (center electrode) and Titanium (tip) means the plug tip size can be reduced to just 1.1 mm in diameter. This further improves the performance.

Each order made on the listing gets you a pack of six spark plugs. That might be an issue especially if you're looking at changing all eight units. At the end of the description, we've included a link to the single/individual spark-plug listing as well.

The Denso Platinum TT Spark Plug offers a twin-tip solution, therefore offering improved performance and life. In comparison to factory spark plugs, it has perceivable enhancements, but it costs less than Iridium ones. With said twin-tip technology, the Denso Platinum TT gets an advantage over rivals. Given the wide use of the engine in Chevrolet's lineup of cars and trucks, the compatibility list is quite huge. The spark plug can be used with 6.0 Chevrolet V8 engines. Some popular vehicles that use this are Corvette, Silverado (and the HD versions), Suburban, Caprice, Trailblazer, SSR, Avalanche, etc.

You'll need to check with the seller about warranty as well as finer compatibility details - info on the former isn't available in the listing. Users are overall happy with the product.

Denso Spark Plug Single pack:

Best Spark Plugs for 6.0 Chevy – Expert Review and Guide

Denso (4511) PT16TT Platinum TT Spark Plug, (Pack of 1)

  • Twin-tip technology with 11 mm platinum center electrode and 11 mm titanium enhanced ground electrode
  • Improve fuel economy, better acceleration and faster starts than all other single platinum plugs
  • Purified alumina powder insulator provides exceptional dielectric strength and thermal conductivity, allowing the material to stand up to extreme stress
  • Purified alumina powder insulator provides exceptional dielectric strength and thermal conductivity, allowing the material to stand up to extreme stress

Best Spark Plugs for 6.0 Chevy – Expert Review and Guide

For a pack of 8, the NGK Laser Iridium Spark Plugs is priced similarly to the other Iridium model on the list. Since Iridium spark plugs offer a lot more than just longer life or easy ignition, it's safe to say that this will enable your engine to perform the way it's supposed to. That doesn't mean you'll get a huge increase in power by simply replacing the spark plugs, but it's bound to make the engine more responsive and the gas mileage improves as well.

But its name might make you wonder why it's called Laser. That's mainly because it's laser-welded - a laser is used for precision welds. That makes the spark plug more efficient, which in turn eases the ability to ignite the air-fuel mixture in the combustion chamber. The use of Iridium is on the center electrode whereas the ground electrode is welded with a platinum disc. The spark plug has a 14 mm thread, a reach of 0.708 inches, and requires a wrench diameter of 5/8 inches.

The NGK Laser Iridium Spark Plug is compatible with a variety of engines including the 6-liter Chevrolet V8. It's compatible with vehicles like the Avalanche, Caprice, Corvette, Express, Silverado, Silverado HD, SSR, Suburban, Tahoe, and Trailblazer, with model years 1999 to 2018. Check with the seller if this spark plug fits your vehicle. Also, drop a message about the warranty because the listing lacks that information.

Best Spark Plugs for 6.0 Chevy – Expert Review and Guide

Bosch 6704 Platinum Spark Plug for Select Buick, Cadillac, Chevrolet, GMC, Hummer, Isuzu, Oldsmobile, and Pontiac Cars, Trucks, Vans, and SUVs (Pack of 1)

  • Platinum firing pin and yttrium enhanced ground electrode provide 2X longer service life compared to standard copper plugs
  • Fine wire design provides better ignitability and performance
  • 360° continuous laser welding to fuse the platinum firing pin for increased durability
  • 4 year performance satisfaction guarantee
  • Original equipment, pre-gapped replacement delivering optimum fit, form and function for a wide range of vehicles including, but not limited to, the following:

Compared to standard spark plugs (copper-made), the Bosch Platinum Spark Plugs are made to last up to twice as long. That's going to be a solid decision-maker if it's difficult to replace spark plugs in your vehicle. It has a Yttrium-enhanced ground electrode while the firing pin has platinum on it, and that further improves the ignitability, which will prove helpful in your Chevy's combustion.

It's claimed to have a service life that's twice as long in comparison to a standard copper spark plug. Other benefits of the Bosch Platinum spark plug includes prevention of pre-ignition thanks to the copper-core ground electrode. The copper-core center electrode helps achieve long life whereas the nickel-plated shell with roller threads aids anti-seize and corrosion-resistance. The platinum firing pin is connected to the base using a unique 360 continuous laser welds.

The Bosch Platinum Spark Plug is covered by an official warranty that lasts the entire spark-plug-replacement interval, although the listing mentions it's backed by a 4-year satisfaction guarantee as well. Check with the seller about the period and other warranty conditions.

As far as its compatibility is concerned, you can install this spark plug in a variety of Chevrolet models with the 6-liter V8 engine. The list includes vehicles like the Silverado, Suburban, Avalanche, etc. Check with the seller to see if your vehicle is compatible. Bosch offers a wide range of plugs on Amazon, and you can get this model as a single pack (this one), a pack of 10, or a pack of four. This is a popular brand for spark plugs, and the users have largely been happy with the product.

Best Spark Plugs for 6.0 Chevy – Expert Review and Guide

E3 Spark Plug E3.54 Automotive Spark Plug, Pack of 1

  • Near elimination of performance inhibiting carbon deposits, dramatically longer plug life and a 5-year/100,000 mile limited warranty
  • DiamondFire electrode technology that creates a superior spark and resulting flame front extending further into the cylinder, producing more localized pressure
  • Significant potential power increase: > 6% to 12% (depending on engine class)
  • Significant potential fuel efficiency improvement: > 4% to 13% (depending on engine class)
  • See manufacturer website for application information.

Backed by a five-year or 100,000-mile warranty, the E3 spark plug is also equipped with the DiamondFIRE electrode, a unique electrode layout, and a claim that its use will result in power and gas mileage increase. It also lowers the overall emissions and comes with a long life. All those things make the E3 spark plug one of the decent choices on the market - and on the list as well.

Unique electrode design

Take a look at the spark plug and you'll see that it's nothing like the conventional ones. It has three legs keeping the electrode in place, connected to the shell. This arrangement is called DiamondFIRE. It's said to offer great heat transfer (aids ignition), increase turbulence in the cylinder (and hence better combustion), and reduce the deposition of carbon. The E3 spark plug also offers smoother acceleration and idle, alongside the aforementioned increments in efficiency, power, etc.

The E3 Spark Plugs product is backed by a long warranty, has a thread size of 0.708 inches, and a thread diameter of 14 mm. You'd need to check with the seller about finer compatibility details. The broad compatibility list suggests that the E3 spark plug will work with a majority of 6.0-liter V8 vehicles like the Silverado (1500, 2500, and 3500; and the corresponding HD versions), Suburban, Trailblazer, Corvette, Avalanche, SSR, Caprice, etc. Users have mentioned that it's a well-made product and it's not expensive, either. Some users, on the other hand, have mentioned the quality can improve, though.

What are the best spark plugs for 6.0 Chevy?

A spark plug might not be the largest component in your truck or sedan, but it helps the gas engine work optimally. An Iridium spark plug might be more expensive but it's bound to last longer and perform slightly better. The platinum ones come fairly close as well. The and ones are platinum whereas the and ones are Iridium. The comes with a slightly different electrode layout. Check with the seller about the warranty, compatibility, and other essential things - like if the spark plug you're ordering comes pre-gapped. If yes, then it's plug-and-play installation.

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