I'm about to perform a tune up on my 2003 sebring, 2.4 DOHC. I would like to know what do I need to replace and what are the best spark plugs to use for this tune up. By the way my Sebring has 162000 miles and still runs pretty good.

 

champion copper plugs

 

-I'd rather go with NGK V-Power plugs if you're going with a copper plug. I've never had good luck with Champion plugs whether they were in a car, a dirt bike, or even a lawnmower. Maybe it's just me, but I can tell a difference when I replace them.

L8R,
Matt

 

Champion is OEM what the engineers that designed the car has in them

 

NGK Platinum to replace the OEM NGK's that I bet are in there.....

 

there is not a platinum plugs for a 4 cyl engine copper

 

-Yep, I understand that they come with Champions from the factory. But like I said, I have never liked them as a spark plug. I put Champions in my Wife's '05 Neon SXT and pulled them out after about a month of driving. Back to the store for a set of V-Powers.

L8R,
Matt

 

copper is best, but does not last as long as platinum
platinum does not have as much flow as copper but can handle heat cycles better than copper
iridium is even stronger than platinum and has just about the same flow as copper, but they are spendy and unnecessary

 

I just replaced mine with NGK Iridium. Should never have to replace them again.

 

Dodge Neon and PT Cruiser owners with the 2.4L always used NGK Iridiums. I personally used them and they were a great OEM replacement. They don't offer much of a performance upgrade, so much as a longer life and you don't have to gap them, and it's harder for them to lose the proper gap.