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Hi Everyone...2 quick questions

Have a 2003 zx3 with 3000 miles. Is it worth while switching out the stock plugs to autolites or should I just wait until it is needed. Have any of you guys put in the block heater plug. My car doesn't have a block heater and I'm thinking of doing it myself.

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Don't worry about the plugs. I have a 2003 ZX3 and changed out my stock plugs at 10K miles with the Denso Iridium plugs and noticed a smoother idle but no performance gains.
Just keep the stock ones until you hit 10K miles and get the AutoLite Double Platniums for less than $10 for all 4 plugs.
 

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Aren't Autolites and Motorcraft pretty much the same thing? What you have in their stock are double platinums if I'm correct and those should last AT LEAST 30,000 miles. I wouldn't worry about them. I'd change my plug wires before I would ever touch my spark plugs. You might wanna check them periodically to make sure the gap is correct.
 

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What exactly is a block heater and what does it do? Well I should say how does it work, I guess it heats the block lol
 
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