I ordered 4 NGK #PZFR6F11 Laser Platinum plugs that the owners manual calls for. According to the owners manual the gap is supposed to be .040 but I see on the Rock Auto website they call for a .044 gap. Which one should I go with?

 

For your application I doubt .004 will make that big of a difference. With that being said, trust the company that engineered the vehicle and use the specs in the manual.

 

Manual says gap to .004 which I assume means .040

 

Your initial data from Rock Auto is the upper end of the service limit for the standard unit of measurement. I've provided a picture from the FSM (clearly my favorite thing to reference as of late!). Please make note that platinum tip plugs are not to be gapped at all.

 

Looks like your info may not be correct. My Honda manual calls for plug #PZFR6F11 NGK or Denso PKJ20CR-M11 which are not listed there in your FSM. Plus I'm reading correctly it says to not gap the old plugs if they are out of spec

 

Which "Honda Manual" are you using? I have a genuine FSM for a 2001. Unless the recommended spark plugs were updated the next year (not likely but possible) then this is the correct information.

You are reading this correctly if by "old plugs" you're referring to the plugs you just bought. Platinum plugs are not capable of being re-gapped. If they are out spec, you simply replace them. If this is the case, I recommend basic G-Power or V-Power plugs. On a stock engine you will not notice any power gains between these and platinum or iridium plugs.

 

The Honda owners manual that came with the car and also on the NGK website say the plugs I purchased are the correct number. Your numbers are different.

 

Then go with whatever information you think is best. Like I said, I doubt that small of a discrepancy will matter.

 

I installed the NGK today. Big difference than the 124,000 mile plugs that were in there.

 

Case in point. Glad it worked out.

 

Thanks for the help. First time Honda owner.