Hi,
I need to know if any of you have used the +4 spark plug from Bosh in your v6's. I have a 2002 3.8 V6 and have not done anything to it yet. How good or bad are these spark plugs?

 

Those platnuim plugs dont perform like a good old copper plug.

copper plugs make more power, are cheaper and um are cheaper. Only downside to copper is they dont last as long. I wouldnt bother with those plugs used them in my f150 were just the same as my cheaper NGK TR55's (stock replacemnt plug for you).

Save the money dont bother.

 

Bosch in general outright sucks. Anything but those.

 

plus trying gapping those plugs...

 

wut do u mean by gapping?

 

Regular plugs are just fine, I would go to a 22 heat range, like the motorcraft AGSF-22FM which is platinum.

 

gapping is when you put the proper distance from the electrode to the little conductor, which I think is called a seat. You have to gap them or else. I think the proper gap for our cars is .520 or something, im sure your manual tells you. do NOT take my word for it lol
I just shocked myself (no pun intended) how long are the plugs usually good for? I remember hearing 18k-20k... but my car just tipped 21k and I have had it since 16k... should I do a little tune up?