Spark plug to use

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Feb 27, 2015 | 12:54 AM

jomia092306

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From: san diego

Spark plug to use

I have a 1988 xjs coupe. What will be the suggested spark plug to use..part# will help..thanks

Feb 27, 2015 | 04:49 AM

Greg in France

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From: France

I have always used NGK BR7EFS.

greg

Feb 27, 2015 | 05:13 AM

Grant Francis

Joined: Feb 2010

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From: Adelaide Stralia

Different markets, different fuels, different spark plugs.

Down here, no Ethanol, I have run NGK BP6EFS forever in the HE engines, no issues.

HOWEVER, NGK now have a new (well for some years now) spark plugs with a "V" groove centre electrode, and that part # on the box in my stash is BP6EF. The "S" in the first part # designated the centre electrode as "standard", and is simply a straight cut electrode.

Getting hard to find now as the "R" (Resistor type) are slowly taking over. The newer cars with COP must use resistor sparkers.

Last edited by Grant Francis; Feb 28, 2015 at 02:27 AM. Reason: I forgot, as usual.

Feb 27, 2015 | 08:55 PM

sidescrollin

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Joined: Jul 2010

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From: Key West, FL

the shop manual reads
pre HE:Champion N10Y
HE: Champion BN5
engine 8s28277 on: Champion RS5C
engine 8s41339 on: NGK BR7 EFS

pre-he gap: .035"
HE on: .025

im sure any of those are fine tbh, i think i have champions in mine, just don't buy any stupid "400 tip super titanium iridium nuclear super spark" garbage they upsell everywhere