Ok Guys...i dont´t like to ask too many questions..but see it for yourself. I made some search and there is a lot of information about what spark plugs we should use..But all the answers are different. Here is my question. I own 2001 CLS ..And the Specs for the Spark plugs (I found them in Manual) are Type S NGK PZFR6F-11 or Denso PKJ20CR-L11. The Information on NGK or Denso website is different ( they do recommend NGK PZFR5F -I11 ) and that spark plug in original manual is recommended for premium model .The recommended by the manual spark plugs I couldn’t find anyway ...Acura CL FAQ also recommend Denso IK-20 or
NGK BKR6EIX-11 wich are not in the list by NGK website or Denso ....For the last 3 years I use Denso IK 24..and never had any problems with them ...but it will be great to know what is the best, OEM spark plug for our engines and were to get it

 

the best plug would either be the NGK Lazer Platnium or NGK Lazer Irdium plugs. Those are OE and will last you another 105k.

 

ngk ftw, just use the one that the book tells u

 

I understand that NKG irridium or platinm is good . The question is what number ? I use IK 24 and so far very happy with them ...but the Specs in our manual are different ..and what I really whant to know is why the specs provided by NKG or Denso websites are different and why the spark plugs part numbers provided by our manual no longer in sale by those companies ...another thing is why the spark number listed by denso or nkg for CLS in original manual listed for CL P ...to many mistakes..

 

Laser Platinum: PZFR6E-11
OE Laser Iridium: IZFR6F11