vs
Spark plug Autolite or Denso
I've been running Denso (5346) IKH24 Iridium gapped .024 on APR stg1 for 48k miles and most recently on stg 2 with no issues.
Pros: no issues
Mileage: 48000 km
Part number: 5346
Autolite a103 gapped to .055" will give you about a 5hp increase and last around 30,000 miles
Pros: 5hp increase, long lasting
Mileage: 30000 km
Part number: A103
Denso TT iridium are so far the best ones I’ve tried in terms of performance
Pros: best in performance
Vehicle:
Ford Mustang
if you want some good plugs, get some denso IKH24, they are 1 step cooler than stock plugs.. I change mine out every 20k miles..
Pros: good plugs
Cons: 1 step cooler
Mileage: 20000 km
Part number: IKH24
IKH 24 plugs with stock coils work just fine. No cutout, rough idle or misfire.
Pros: no cutout, no misfire
Cons: stock coils
Vehicle:
Volkswagen
Replaced stock with denso ihk24.
Part number: IHK24
Just an update for you and a PSA: CHECK YOUR SPARK PLUG GAP ON NEW PLUGS. I too trusted that the iridium plugs that I just bought should've been pre-gapped, but I noticed immediately after a tune-up my gas mileage went to piss. Popped the plugs back out and sure enough each one was well over 1mm .
Cons: gas mileage went down
Porcelain tip fell off one Denso spark plug in cylinder 1. Doing less the 200km distance. Motor is f@$ked.
Cons: motor is f@$ked
Mileage: 200 km
I’d never put autolites in a Jeep, send em back and get champions or NGK depending on year and model.
Vehicle:
Jeep Wrangler
I quit using autolite plugs somewhere between 1995 and 2000, got tired of all the comebacks.
Cons: tired of comebacks
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