WD wrote on 12/31/69 at 16:00:04:For some reason, newer plugs don't seem tohold up very well. My 49 Dodge truck had 1960's plugs in it when I got it back onthe road in 94. They fired off the engine with no problem. My Savage, my wife's Intruder, and my 69 Dodge truck, all with modern plugs, go 3-6 months, and start running rough. At 6 months, change the plugs and they run great again. Very starnge, plugs shuold be higher quality with the "improved materials and manufacturing processes". My 85 Celica GT-S, change the plugs every 3 months, no ifs ands or buts about it. I guess plug technology can'tkeep up with ever changing fuel blends, burn rates, higher combustion chamber temps, etc.
You're right, that plug would be fine in an older engine. I used to run HD plugs until the electrode was worn almost completely away with no problems. Ditto my 85 F250 with a 460 V8.
-WD
I dunno. I have no older engines.
...my '99 Malibu with 217K has only had 2 sets of plugs. My '01 Dodge Ram with 70K is on the originals (have new ones already, just not installed), my '00 Savage is running on a 3 year old plug, and my spouse's '01 is running on a 3 year old plug too (changed at the same time, for no reason)...oh yeah, I changed the wires in the Malibu too.
I can't explain your bad luck with plugs, and unfortunately it seems that you spend a lot of time changing them...any ideas why?
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