What is the word around about these plugs in 5.0s.

I put the platinum 4 in my Grand Prix and because GM produces such a hot spark that the plugs are eaten away after about 5K miles. They did give me a powerband type feel but how do they comply with our engines?

 

they shouldn't ahve burned away....I would never use a bousch other than the orginal ones.....ngk makes a really good plug....spark plugs don't change rpm band nor give horsepower gains.....unless their fouled out

 

Tell that to bousch about burning away. But it kind of sucked when i was getting backfiring after 5,000 miles from putting in the new plugs.

That is probably why I felt what i felt. The old ones were SHOT. Using AC delco now....they work great...for my Grand Prix that is. Now on to my Mustang......lol

 

those in some autolites

 

They suck. They only work well in certain applications....stangs aren't one of those.

 

Bosch Plugs suck, wouldnt run them in anything.

I like autolite 24s in stock mustangs

 

my stocker likes the reg bosch plat...

 

stocker mustang??? Maybe you should try some AC delco platinums then. LOL I guess there is a first for everything

 

Ive put bosch platniums in both my 92 Gt daily driver and had them in my 73 firebird. Actually they worked great for me. Im prob going to go iridium next time though so we will see.

 

plantnum4's are garbage. i tried them in my ranger once and the ranger ate them up. they fell apart so fast i couldnt believe it. i will never buy bosche plugs again