Quote:
Originally Posted by smk_texas
I am fixing to change plugs in my 03 ML500. Should I use the bosch platinum +4 or the regular bosch F8DPP33 (see attachment) . Please advise. Thanks.
smk_texas
03 ML500 70K
98 S420 71K
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Good question,I was looking to replace plugs also. I don't know the answer, hopefully someone who does will chime in.
******** lists 3 plugs:
4501
Bosch
Spark Plug; IR Fusion+4; Iridium/Platinum with Four Electrode
16 per engine Patented fused iridium and platinum center electrode for better than OE Iridium performance. $20.20 $6.52
4418
Bosch
Spark Plug; Platinum+4; 4 Electrode
16 per engine Pregapped for normal usage. Not recommended for supercharged or turbo models. $13.80 $4.86
7422
Bosch
Spark Plug; Platinum; Standard Electrode; OE Plug
16 per engine Updated version of OE spark plugs F8DPER and F8DPP33. Pregapped for normal usage. $17.95 $4.37
7422 seems to be "OEM'.
Does anyone know what would be one heat range colder? For example would a 4417 be one heat range colder or hotter than a 4418?
Regards,
Jerry