New OEM Spark Plug Update

Some more information regarding the newer OEM NGK sparkplugs from a forum member on Golfmkv.com:

When comparing to a bosch stock plug many goof on the difference in how their ranges work. Because of that some cross references out there show the 6 heat range NGKs being stock. If you go to NGK themselves and check THEIR application guides it shows a heat range 7 as being stock.

It seems that the newer spark plugs may not be one step colder.  I wonder why they changed over from the Bosch plugs?

Here is the older article: New OEM plugs

06H 905 601 A / NGK PFR7S8EG

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New OEM Spark Plugs – 06H 905 601 A / NGK PFR7S8EG

 

New OEM Plugs

There is a new part number for the OEM spark plugs – 06H 905 601 A.  They are made by NGK now instead of Bosch.  The corresponding NGK part number is NGK PFR7S8EG.  This new plug is a double platinum laser plug that is also one step colder.  I guess all those people advocating one step cooler plugs were correct.  Anyway, I installed these last night and the engine is purring as always.  The BKR7EIX’s I had in there had begun to show erosion at the ground electrode and the gap had opened up considerably.  I did not notice any real change in performance, slightly smoother idle is pretty much it.  I’ll report back if it affects mileage considerably.

This plug supercedes part number 101 905 631 H which superceded 101 905 631 B.  The previous part was a Bosch FR6KPP332S.

Anyway, here are some pictures showing the new plugs.

A DIY is located here if you need it.  >DIY Spark Plug Change

*Update*

Some more information regarding the newer OEM NGK sparkplugs from a forum member on Golfmkv.com:

When comparing to a bosch stock plug many goof on the difference in how their ranges work. Because of that some cross references out there show the 6 heat range NGKs being stock. If you go to NGK themselves and check THEIR application guides it shows a heat range 7 as being stock.


06H 905 601 A / NGK PFR7S8EG

06H 905 601 A / NGK PFR7S8EG

06H 905 601 A / NGK PFR7S8EG

Copper Spark Plugs In The 2.0T FSI

NGK BKR6EIX

NGK BKR6EIX

So, upon hearing the “good things” about the performance of copper plugs versus platinum and iridium plugs, I decided to get a set.  My stock plugs were in need of replacements and at 10 bucks for a set of NGK coppers, I decided that it would be worth a try.  The stock heat range copper plugs are the NGK BKR6E (stock #6962).  I popped them in and they felt great.  Just like a new set of plugs should.  However, over the next 1000 miles or so that I had them on, I noticed my mileage beginning to go down.  I usually average about 28mpg on the highway and with the coppers it went down to about 24 and below.

I don’t have any explanations for why it happened.  This was on my daily commute as well.  The only thing I can think of right now is the firing end design.  Both the iridium and the stock platinum plug are fine wire designs.  Don’t ask me for an explanation as to why it would affect the combustion, it shouldn’t make that big of a difference.  But I saw it.  The tank range went down a pretty good amount.

Power was pretty much exactly the same, except with this seemingly terrible mileage.  I didn’t think it was the spark plugs until I decided to replace them with the NGK iridium fine wire equivalent, BKR6EIX.  My mileage went back to my normal 28-29 highway.

The copper plugs looked like they were running very well when I pulled them.  No deposits, even coloration, about as pretty as a spark plug could look.  Maybe the coil packs just didn’t like them or something.

*The weather has been getting cooler recently, and mileage has gone up some more.  This engine does not like the summer.

5/24/2011

The BKR6E may not be exactly the stock heat range.  The stock heat range may actually be a “7” for NGK plugs.  Maybe BKR7E is the appropriate plug.