My CC is 2 years old and I have accumulated 65k miles. I changed the plugs at 60k. They looked pretty toastyso I am glad I did.
Plugs 97K on my 2010 original ones...working great (lots of highway miles). I'll be changing them at 100K.
For the misfiring check your spark plugs it can be that simple... i got a mkiv golf too.
going on almost a year on champion $1.99 copper plugs and my car runs just as good if not better than when I had the oem plugs in there...
the Champions are really surpassing my expectations!
I bought Champion Copper's....they're like $3 a pair, and she pulls like a SOB. I just replaced the Champ with the exact same....save ur hard earned $$ and spent it on wax or lights or some other accessory to make her stand out
car has been running with champion plugs so thats what i put in and it reved to 6500 just fine......the car likes the new stuff i put in a lot.
I do know certain Toyota "sporty" cars run like crap on Champions.
STAY AWAY FROM CHAMPION SPARK PLUGS they tend to have a insulator cracking problem
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