SPARK PLUGS

snooper0069 · November 9, 2003

MY 94 GMC SIERRA 350 CALLS FOR THE OLD COPPER PLUGS AS STOCK. I HAVE 133,000 MILES ON HER SHOULD I TRY THE NEWER DELCO PLATINUM PLUGS , OR STICK WITH WHAT THE BOOK CALLS FOR

SnakeEyeSS · November 9, 2003

I put platniums in mine(TRUCK), it runs great and fires up quick, but it always has though!

TarheelZ · November 10, 2003

For what it's worth, it seems that more and more of us with the newer models that come with platinum plugs are switching to the copper plugs. I'd recommend you stick with those.

bowtie_pasta · December 4, 2003

Stay with the copper plugs!!!!!!!!!!!!

I had a horrible experience when I went to platinum. They worked ok for a while then I started having problems. Ended up taking it to my mechanic before we found a cracked plug. He said they were the wrong plugs. I changed the rest back to copper and found another 3-4 platinum plugs with hairline fractures starting on the porcelain.