Denso Spark Plug Quality

[Britdude74]

Are you sure they are genuine Denso?

My thought precisely, I prefer NGK

 

[Britdude74]

Agreed. Once bitten twice shy.
On one hand I try and tell myself it is a lesson well learned and on the other hand I feel like such a dumb ....

In a past life I worked for AAP, probably sold 5000 plugs in that time OEM part number best for 99% of vehicles, easy returns and warranty !!

 

[Britdude74]

In a moment of Frustration I had a customer ask for Some cheap plug that was on sale, of course when plug fails I am bad guy. So I said, ‘ so you want your car to mis-fire, he huffed and left the store

 

[kschachn]

In a moment of Frustration I had a customer ask for Some cheap plug that was on sale, of course when plug fails I am bad guy. So I said, ‘ so you want your car to mis-fire, he huffed and left the store

And you used Denso or?

 

[kschachn]

My thought precisely, I prefer NGK

NGK gets counterfeited often as well, they too have a section on their website on how to identify genuine plugs.

 

[Britdude74]

NGK gets counterfeited often as well, they too have a section on their website on how to identify genuine plugs.

My point buy at reputable store, in 7 years at AAP never had NGK

 

[Britdude74]

Big problems with Triton V8were plug broke in 2 pieces, certain VAG vehicles that used side electrode stuff, we sold plugs for mini- bikes

 

[madeej11]

My point buy at reputable store, in 7 years at AAP never had NGK

Didn't sound like that was your point. It sounds like you're biased. Both companies make a great product, both get faked.

 

[paulo57509]

Back in the late 1960's - early 1970's, counterfeiters didn't even try to make it look legit.

I remember some counterfeit AC GF61 fuel liters coming in a box that looked like an AC fiter box. But the red AC circle was blank and the filter didn't come with those short pieces of replacement hose and Corbin wire clamps.

Counterfeiters tried to do a better job with Motorcraft parts. The box looked like the Motorcraft box but the streaking GT-40 (?) looked more like a 3/4 view of a '58 Vette with a man standing next to it. It was labeled, "Motorcar".

 

[Britdude74]

I can assure you I am NOT biased, I do have 2 Engineering degrees, built several complete cars etc

 

[Passport1]

Swapped out some NGKs today at only 45K miles. Car was running perfectly but the plugs were original and had been in the engine for 10 years. Thought it was time to get them out before they seized. Replaced with a fresh set of Denso Platinum TTs. Easy out, easy in. Kept the NGKs in case the Densos fail. Purchased from RA so I believe they are real.

 

[Chris142]

Back in the late 1960's - early 1970's, counterfeiters didn't even try to make it look legit.

I remember some counterfeit AC GF61 fuel liters coming in a box that looked like an AC fiter box. But the red AC circle was blank and the filter didn't come with those short pieces of replacement hose and Corbin wire clamps.

Counterfeiters tried to do a better job with Motorcraft parts. The box looked like the Motorcraft box but the streaking GT-40 (?) looked more like a 3/4 view of a '58 Vette with a man standing next to it. It was labeled, "Motorcar".

I remember counterfeit ac Delco brake pads made from compressed cardboard.