Hi

Im a bit confused on the spark plug sizing requirements needed for the 3G TL. I opened up the cylinder coil and saw that it had some Denso IK20TT plugs in there. So I went and replaced the one with that (cylinder 5 had a misfire). Problem got fixed but I then thought I may as well replace all them. So i went to O reilys and asked for some plugs for the tl and they were saying does do not fix the car, NAPA online was saying the same thing. They recommended Denso PK20TT. So I'm curious, what size should I go with? Or what plug size/type should be used?

Thanks

 

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