vs
Spark plug Denso or OEM Mazda
I would recommend that if you get one do a full service fluid change on everything. Change the coolant, the trans fluid, diff fluid, oil (10w30 or 10w40, do NOT use the 5w20 reccomended). You'll also want to set aside $80-90 for new spark plugs, and upgrade the coil packs to LS coils from Bennet Built whenever you can. Coils need to be replaced about every 30k miles.
Pros: strong rotary, mechanically inclined
Cons: everything is breaking, plastics dry
Vehicle:
Mazda
Mileage: 73000 km
Denso work quite well
Pros: work quite well
The plugs EQT recommends are compatible. I’ve been running Denso 5749 plugs for over 10k without issue
Pros: compatible, no issues
Mileage: 10000 km
Part number: 5749
i just put the densos in my '17 alltrack with a stage 1 tune and they run noticeably smoother than stock. i gapped them to 0.026" before install. it didn't seem like plugs would be that important for a stage 1 tune so i've been surprised.
Pros: runs noticeably smoother
Vehicle:
Volkswagen
Denso always.
Pros: good quality
Vehicle:
Toyota
I also went with the IKBH20TTs. I noticed my mpg was better after doing so, and the truck seemed to idle and drive smoother.
Pros: better mpg, smoother idle
Mileage: 95000 km
Part number: IKBH20TT
I ended up going with the Denso IKBH20TT because I couldn’t find any FK20HBR8 at a reasonable price and availability.
Part number: IKBH20TT
I replaced the plugs with DENSO 5358 roughly 10K miles ago.
Mileage: 16093 km
Part number: 5358
I tried Denso once and didn't have great luck with them.
Cons: not great luck
I tried one of the economy plugs on my 02 Accord. Ended up having to chuck it and buy a Denso.
Pros: learn from my mistake
Cons: waste of money
Vehicle:
Honda Accord
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