Those plugs were the worse purchase I ever made. Mine lasted three months with no performance increase on my first engine and then got worse. Pulled them to find one had the center electrode missing. Pulled them and threw them strait in the trash.

 

 

I'll finish your post title..."are a waste of ca$h."

 

Mine went in the trash also......

 

Dad always said - if it seems too good to be true, that's because it is!!

Bovine scatology!!! (BS)

 

There are longer listing plugs but to say they make more power?. Might be a stretch....I like double platinum plugs or iridium because for a minimal price increase they last a long time... That has been my experience....I don't get them for performance increase, just peace of mind.

 

re: last a long time - dont you just replace them at the service intervals?

 

I bet they are made in China....but heck, everything is made in China now...

 

I found the Pulstar plugs for half price so I gave them a try, and so far have 4K miles on them with no problems. I will pull them this weekend to check them out. But my mileage has been good and Power is also good. But to say there is an earth shattering difference between these and NGK iridium, no I can't really tell much difference. Now I had Autolites and I thought they sucked. I had the NGK for 15K and they still looked almost new.

 

If they are still good they stay in there... The first set of SE Double platinum I put in stayed in there until 60000 miles, now I am at 87000 miles and they look fine so no reason to replace them... Waste of money...