NGK plug question,

muzz67, Oct 2, 12:14pm
Went to get some NGK BKR5E-11 plugs, was given BKR5E"S"-11 instead.
Does the S make any difference? They appear identical dimensionally.
For an old Courier farm truck.
Cheers.

kazbanz, Oct 2, 12:42pm
DONT take my word as gospel but I thought there was an extra built in suppressor or resistor in the S

jmma, Oct 2, 1:02pm
The letter “S” indicates a copper center core

franc123, Oct 2, 4:46pm
As above, CC plugs. Your engine isn't going to care about it.

muzz67, Oct 2, 6:32pm
Thanks guys ,appreciated.

gph1961, Oct 2, 8:29pm
means extended center electrode

jmma, Oct 2, 9:07pm

pauldw, Oct 3, 7:21am
Can you even get an NGK plug without a copper core? The ES is a standard plug, the E is V groove centre electrode. https://ngk-sparkplugs.co.th/product-knowledge/basic-knowledge/spark-plug-characteristics/

kazbanz, Oct 3, 2:07pm
There ya go I learned something--I was darn sure the S was suppressor in NGK code

gph1961, Oct 3, 7:52pm
E=1.5 mm CE(V-groove CE)
S=stand.2.5mm copper core CE

franc123, Oct 3, 8:15pm
No that is covered by the R earlier in the code, R being resistor.

supernova2, Nov 10, 10:06pm
Much more up to date NGK data
https://www.ngkspark.co.nz/products/spark-plugs/
Scroll down a few pages to get the chart