NKG sparkplug

[Alan]

Do they sell them in boxes of ten in the States too? I never understood that.

[Charles P]

Do they sell them in boxes of ten in the States too? I never understood that.

Yup
They don't suit 2 Volvos so maybe ten outboards?

C

[Alan]

That’ll be a Chevy V8 and a Harley, then.

[Ivor Hawkins]

I’m running on NGKs at the moment, in fact just come back from a blast in the box and it seems to b3 buzzing along nicely, nevertheless, I ordered some Champion D21s this morning, so I’ll see if the old banger runs any better and will report back.

[Charles P]

Aside from the slight intolerance to suboptimal mixtures with the more modern versions I've never had a problem with NGKs. I've tried Champions in various grades and compared them to A6, A7 and A8 NGKs and found no difference in performance.

C

[Duncan Grimmond]

I have had "never touch them" advice regarding Bosch, NGK, Champion and other makes and I've never had any trouble with any specific make or engine. I use Bosch Platinum in the BMW engines I have, I had Champion in the last Austin 7 and the BSA Trike has NGK. I usually change the plugs at around 6000 miles as a matter of course, a little extravagant perhaps. They all seem to start first kick and run well enough IMHO and if they don't I assume it's operator malfunction unless there are other symptoms.
(Oops,I shouldn't have said that should I...)

[Tony Press]

Check carefully:

How to identify fake spark plugs | NGK spark plugs (ngkntk.com)

[Duncan Grimmond]

Having read that article I will check...

[Ian Williams]

Once you have the correct grade plug and correct mixture I have found no difference in performance between any of the brands. I in actual fact use a lot of NOS Lodge and KLG plugs in my cars simply because I like the appearance of more period looking plugs, and I have been fortunate enough to bulk purchase a few, but that is of little relevance. My original comment was to raise awareness that NGK plugs are not particularly tolerant of less that ideal combustion environments, I do find that if you are going to have an NGK plug go down it will happen quite quickly after replacing them, once they have a fine layer of light brown/grey soot on them they appear to be reasonably reliable.