NGK # 3186 G-Power Platinum Spark Plugs TR5GP - 8 PCSNEW
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Best for
Best for V8 engines
Amazon rating
Amazon aggregate, one input among many in the Verdict Score
Current price
$36.97
Updated Jun 27, 2026 · 1 min read
The consensus
What reviewers found
Synthesized across the trust-weighted source mix below.
The NGK G-Power Platinum TR5GP set sells as an eight-pack, making it a natural fit for V8 engines, and it carries a 4.6-star average across nearly 4,900 verified-purchase reviews. The reviewer consensus we read treats it as a solid mid-tier upgrade: platinum sits between copper and iridium on both price and service life. The 4.6 average is a notch below the iridium and copper standouts, and platinum plugs generally don't match iridium's longevity, which buyers should weigh against the convenience of a complete eight-plug set.
What reviewers liked
- Eight-pack convenient for V8 applications
- Large verified-purchase base of nearly 4,900 reviews
- Platinum construction offers a step up from copper at moderate cost
Where it falls short
- 4.6 average is slightly below the iridium and copper leaders
- Platinum generally shorter-lived than iridium alternatives
- No independent or community testing data available
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The NGK G-Power Platinum TR5GP set sells as an eight-pack, making it a natural fit for V8 engines, and it carries a 4.6-star average across nearly 4,900 verified-purchase reviews. The reviewer consensus we read treats it as a solid mid-tier upgrade: platinum sits between copper and iridium on both price and service life.
The 4.6 average is a notch below the iridium and copper standouts, and platinum plugs generally don't match iridium's longevity, which buyers should weigh against the convenience of a complete eight-plug set. No independent testing or community signals were available for this listing, so the assessment rests on owner satisfaction at scale. As always, confirm the heat range and fitment for your specific V8 before ordering.
- G-Power Platinum
- Designed to operate over a much wider heat range than ordinary plugs
- Resists carbon buildup and pre-ignition
- Patented triple gasket sealing process eliminates the possibility of combustion gas leakage
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