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Username Post: A education on Spark Plugs
Senior Member
Posts: 9697
Loc: Plano, TX
Reg: 08-28-03
02-20-12 12:26 PM - Post#2193008    
    In response to technitom

  • technitom Said:

As a young fella I was told the rule of thumb was that Champions work best in Chryslers/Dodge, Motorcraft in Fords, AC Delco in GMs....

Any REAL truth to that?

NGK? (I always ran those in dirtbikes with good performance)

The only thing about running the exact plug specified by the mfr is that a cross-reference from AC to Champion, for example, might get you a slightly different heat range. Back in the day, I ran Champion J-10 and J-12 in my Chevy V-8s. As I recall they were roughly the same heat range as AC 44 and 45, but probably not exactly the same. Did that matter? I doubt it unless the engine was on the ragged edge of fouling or pre-ignition.

Regarding NGK, I too used them in 2-stroke dirt bikes in the 70s-90s. As I recall, they were the first plug I ever saw that used a platinum center electrode.

For what it's worth I have been using Bosch and NGK platinum plugs in my project car and truck for around 15 years now. Neither vehicle gets driven more than 1,000 miles/year, so platinum is probably overkill for me. But it's nice that they rarely need to be re-gapped.

1982 C-10 SWB pickup -- Unmolested base truck, original paint, originally with 250 six and 3-on-the-tree
Now has 355 with Vortec heads & RamJet roller cam, TH350
Retired, but working part-time on 50s-70s cars and trucks.

Edited by MikeB on 02-20-12 12:27 PM. Reason for edit: No reason given.
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