Hi Guys
Thanks for chiming in on the great spark plug debate. The challenge has been sourcing the RC12YCC plugs. Anyway I did some research and came up with this link to the Jaguar Technical Bulletin

http://www.jagrepair.com/images/TSB/...rivability.pdf

So in the end It looks like the way to go. I have no problem with NKG Plugs but am very unclear what their equivalent plug is, thus my confusion

Thanks for all the Input.
BigBossRadio in Dallas TX

 

Either:

• NGK BKR5E
• NGK stk 7938

Champion RC12YCC - Alternative spark plugs




The BKR5E is a round tip single pronged (1 ground electrode)
The STK 7938 is a square tip double pronged (2 ground electrode)




As with many things, ther is no UNIVERSAL best with spark plugs, Environmental factors, elevation from sea level, driving style, engine age & state, pretty much guarantees the different cars will react differently to different parts. Sometimes barely, and other times massively. I'd suggest asking someone locally what's worked best for them. Probably the best bet when it comes to these highly partisan subjective debates where multiple acceptable choice exists.

 

Hi Suede

Thanks for that nice piece of advice, you are right. As usual it's always difficult to make a choice when faced with conflicting advice.

BigBossRadio in Dallas,TX