Re: IML: 1968 Crown Convert spark plugs

[Christopher H <imperial67@xxxxxxxxxxxxx>]

Title: Re: IML: 1968 Crown Convert spark plugs

Tom,

I’ve never had good luck with Champions in Mopars, and this issue comes up here often enough with some Champion loyalists and then a bunch of us who swear by Autolites (#85 fits our Imperials).

Plugs are considered a maintenance item but they should last for years in a car that’s only occasionally driven. If they are clean and you’re not having a pinging or hot-running-up-hills problem, then maybe just switch to Autolites when the plugs need changing. I used to get about 5,000 miles from Champions before they would foul, and I honestly don’t remember when I put the Autolites in but it’s been at least 5 years.

As for modern plugs like iridium or even platinum, use them in your new cars or imports (I do), but never in a Mopar! 

Chris in LA
67 Crown
78 NYB Salon


On 9/4/06 6:04 AM, Crestonave@xxxxxxx at Crestonave@xxxxxxx wrote:

> I've owned my car for four years (third owner) and never touched the plugs. Are these considered a maintenance item which should be changed periodically or should I just leave well enough alone? I only use the car in the warmer weather. The most I put on the car would be 1500 miles/year and it's probably less than that. The car is running fine (maybe a little rough at idle). I pulled a plug and from what I can tell the plug looks ok. The wires look pretty clean and new. I did put an electronic ignition in the car when I got it. 
>  
> The plugs currently in the car are Champion RJ12YC. Should I change the plugs? What would you suggest I use? Any benefit to using a higher-end plug such as NGK Iridium? 
>  
> Thanks for the advice.
>  
> Tom
> 1968 Crown convert
> 1960 NYer coupe