NGK/Denso or Champion. NGK for cars and Champion for small engines have never steered me wrong
Spark Plugs - Looking for opinions
- Thread starter Wylie6G72
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I’ve only had two failed plugs in my entire life. The first was an OEM Motorcraft Platinum in my 2013 Ford C-Max at 17K on the odometer (warranty replacement, I paid for the other three to be replaced at the same time). The second was one of the replacement Motorcraft Platinums 33K later on the same motor, different cylinder. Considering that was a plug-in hybrid and the motor was only firing about 50% of the time. I was pretty appalled by the lack of longevity on the spark plugs. After I replaced them all with NGK Iridium, I never had any spark plug issues for the next 50K when I got rid of the car.
Whatever you go with, source them locally. Lots of counterfeit spark plugs on Amazon, EBay, and the like.
Whatever you go with, source them locally. Lots of counterfeit spark plugs on Amazon, EBay, and the like.
Motorcraft or NGK, but i would not change them at 37K.
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NGK United States web site is terrible,
use the Canada one...
https://www.ngksparkplugs.ca/partfinder
use the Canada one...
https://www.ngksparkplugs.ca/partfinder
I agree with this. I changed my 5.7 HEMI’s copper plugs out for Autolite Iridium XP’s and was told all sorts of wild stories, like the “coils aren’t strong enough and you’ll get misfires” or “you’ll cause detonation even if you use the same heat range!” Never had a problem with them, engine ran great.
I have done countless tuneup professionally and tunups over 5 decades,
On a Passenger car/truck, NEVER touch ignition if it is running fine and isnt near a service interval.
NO need to "look at the plugs".
This isnt 1967 or a 3 valve Modular
The American made NGK V power have been garbage. Usually a 1/2 step hotter than factory.
their Ir plugs are good.
Your friend likely spec'd the incorrect plug. Also many plugs have varnish on the termnals and
sometimes you don't get a good connexion with aftermarket wires with no teeth or on ODPE with no teeth.
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Agree 100%.
And on the flip side, I’ve seen engines run far worse with plugs that weren’t OE...to the point the whole job had to be done over because the engine was misfiring.
And I wouldn’t ever bother changing plugs before a recommended service interval - it’s probably the only thing on a car that can go past a service interval, easily.
Bingo! I replaced my Ford Explorer plugs last summer and it's a chore. Plugs are one of those parts that they are so cheap, often very difficult to replace, and replaced only 4-5 times in the entire life of the car that you just spring for the very best. This gives you longer service life and better quality.
In that list, I'd pick Motorcraft, Denso, or NGK. I suspect Motorcraft is the OEM. I'd pick plat or iridium tips.
I have 5 plug jobs to do this summer, and they Fords get Motorcraft and the Toyotas get Denso. Already purchased. Edited. Actually, I only have 4 to do, just looked and my records show I last put NGKs platinums on my 4Runner only 40k miles ago so I won't be changing those for many many years at my slow driving rate.
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I am running one heat range colder in my other car, which is driven mostly on the highway...
https://www.ngk.com/what-is-a-spark-plugs-heat-range-2
LTR6IX11 —> LTR7IX11
https://www.ngk.com/what-is-a-spark-plugs-heat-range-2
LTR6IX11 —> LTR7IX11
Lol, that is so funny. I currently have Autolite XP's in a 3.6L Jeep Grand Cherokee and a 2016 Ram Hemi 5.7. Just fine on both.
Playing with spark plugs is old man stuff. Iridiums. One set every 100,000 miles. If you feel like it, go 150,000 miles. Most tales of someone’s BIL having bad results from certain plugs are from screwing up things like not putting the plug wire on fully and such.
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I am getting ready to install new NGK G-power platinum alloy plugs in my truck.
I have read a lot of good reviews on them, and decided to give them a try.
Has anyone here used them and, have you had good luck with them?
Thanks so much in advance.
I have read a lot of good reviews on them, and decided to give them a try.
Has anyone here used them and, have you had good luck with them?
Thanks so much in advance.
I've used several sets of Bosch platinum in Ford 1.9 and 2.0 engines I own or have previously owned and have never had a problem with them. I know I've ran a few sets to well over 100K miles and only changed them then because I felt guilty they'd been in so long. After changing them I didn't see any difference in performance or fuel mileage.
I also replaced the factory plugs in my old lawn mower (20HP Kohler twin cylinder) with Bosch platinum. When the mower wore out I'm guessing the plugs had been in it for 10-15 years and were still doing their job. I've been using Bosch platinum probably at least 75% of the time for the last 30 years.
If you just want to see what the plugs look like, pull 2-3 that are easy to access and use their condition to represent the rest. Yes I know they will all be from the same bank, but if the engine runs well I'd say this is an easy way to avoid pulling the intake to access the passenger bank. Spark plugs rarely go bad in modern FI engines.
Bought the least expensive iridium, SPK, for the latest acquisition, transverse Toyota 3.3l V6, but when I found the Denso iridium TT they seem clean enough to go for another 50k at least, previous owner likely had them replaced recently, but I didn't have any history documented of that. I did re-gap them finding them all a little short of the .042 spec. The SPK's will go into inventory for future use and hopefully I will feel wealthy next change and get the Denso or better, my frugal instincts sometimes override the thought process of purchasing for quality, never again for valve cover gaskets...
Ruthenium ...... they are awesome.
Check the gap because mine needed adjustment before inatall.
Best plugs I have used.
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