Owner reviews for spark plug

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OEM Volkswagen › Spark plug

TheSoup05 18 Oct 2023, 16:28

Rating 4.0

I had a 2012 Passat I drove for 10 years (after buying used with ~20K miles) and only just replaced two weeks ago with ~125k miles. I had to replace the alternator at one point and some other general stuff like spark plugs over the years, but that was it really. Nothing super expensive.

Pros: nothing super expensive

Vehicle: Volkswagen Passat

Mileage: 125000 km

NGK › Spark plug

vapestarvin 15 Oct 2023, 03:40

Rating 5.0

Acceleration:

On Rock Auto Denso...Denso double platinum spark plugs for $4.32 each, but I would opt for the NGK Rutheniums for $8.32 each because they last longer and provide better combustion in these older engines

Pros: last longer, better combustion

Bosch › Spark plug

argsoftmax 14 Oct 2023, 00:36

Rating 4.0

Acceleration:

Today I installed new spark plugs and the misfiring situation has improved significantly but is not completely gone. If I pull up the RPM too quickly the misfire counter goes up.

Pros: misfiring situation improved

Cons: misfire not completely gone

NGK › Spark plug

PMMEYOURQUAKERPARROT 12 Oct 2023, 03:59

Rating 4.0

I went with the NGK rutheniums as they're also rated for 100k and were slightly cheaper on Rock Auto than the iridiums. Supposedly they maintain fuel efficiency longer over their life than iridiums

Pros: maintain fuel efficiency longer

Cons: no personal experience

Vehicle: Honda Fit

Autolite › Spark plug

PM_ME_ALL_YOUR_THING 30 Sep 2023, 15:12

Rating 4.0

In my 206 classes we run this autolite sparkplug because it’s required.

My understanding is that we switched because people were buying plugs in bulk and looking for ones with the lowest internal resistance believing it would effectively advance the engines timing. Supposedly these autolite plugs are much more consistent.

Pros: more consistent

OEM Toyota › Spark plug

Ed_Trucks_Head 21 Sep 2023, 14:13

Rating 5.0

Starting:

O drove my Corolla to the point the spark plugs weren't firing and the car wouldn't start. I changed the plugs and it ran great after that.

Pros: ran great after replacement

Cons: wouldn't start before

Vehicle: Toyota Corolla

AC DELCO › Spark plug

diablo75 20 Sep 2023, 18:26

Rating 4.0

Acceleration:

I use them. Just replaced a set after they'd lasted 90,000 miles, only to rule out a very very tiny misfire count issue I've noticed lately. I might get a coil pack now, but those original plugs surely would have lasted longer (they say they should last for 100k).

Pros: lasted 90,000 miles

Cons: tiny misfire count issue

Mileage: 144840 km

NGK › Spark plug

dbxrtc1 25 Aug 2022, 12:29

Rating 3.0

I've used Autolite plugs in my stock 2011 for 6 years. I wanted to try NGK's so I recently installed a set of Ruthenium NGK plugs. I haven't noticed any difference between the two brands.

Pros: no noticeable difference

Vehicle: Mazda

NGK › Spark plug

Medical-Style-5160 17 Aug 2023, 00:33

Rating 1.0

Idle:
Acceleration:

I did buy 3 set ngk iridium from ebay for several vehicles and they are all fake . it misfire and destroy coil too...as soon as took the out the tip of the plugs worn out to the bone...

Cons: misfire, destroy coil

AC DELCO › Spark plug

Crawlerado 28 Jul 2023, 10:58

Rating 1.0

Starting:
Idle:
Acceleration:

Bought a set of iridium plugs that were wasted after 15k miles. Amazon gave zero fucks. AC Delco gave zero fucks. The scum bags who sold them changed their name and keep selling.

Cons: wasted after 15k miles

Mileage: 15000 km