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Kirk
Reviewed in the United States on May 25, 2024
I've been using Denso Iridium plugs for YEARS and they last for YEARS without issue! I never have had even a single defective spark plug with the Denso name on it. I HIGHLY recommend these plugs, NO MATTER WHAT you plan on using them in.I drive an older Tahoe (2005) and once I put these in replacing AC Delco plugs, I gained a smoother idle and just over 1.6mpg/highway. Unfortunately, my local mileage hasn't changed, but my acceleration did!Outside of the Ruthenium (think that's the spelling) plugs by NGK, these are the best damn spark plug on the market, and this is coming from a man who not only worked on the M1 Abrams main battle tank, but has 39 years of experience, 36 of that as a true professional with a technical college education (why I joined the Army in the first place) and countless schools and certifications afterwards plus countless additional classes/schools since. My education is still ongoing as it has to be in order to stay as abreast of the ever-changing technology used in today's cars, truck and even heavy equipment!If this isn't enough to convince you to be using Denso plugs, I don't know what is.Kirk AKA CptKirk
tystick
Reviewed in the United States on March 12, 2024
I would have liked it much more if it was a sparkplug and not a bolt in the correct sparkplug box.
joe mottsizz
Reviewed in the United States on December 24, 2022
awl kinds of spark now
SebastianT
Reviewed in the United States on December 9, 2016
My John deer z425 was running terrible with only 300hrs, - changed the plugs - runs like new.John Deere recommends changing the plugs every 100hrs
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