I just found some NGK TR55s in my garage that I was planning on putting in my TA but then I noticed that some of you were using them in your trucks. Should I put them in my 08 or just not worry about it since my stock plugs only have about 3k on them? I'll do anything for better gas mileage.

 

not yet. the platinum plugs you have in there are good until 30-40K. the swap wouldnt gain you any mpg.

 

Thats all I needed to know, thanks.

 

I bought some new plugs for my truck and they didn't have the NGK TR-55s just the TR-5s what is the difference?

 

The only thing I can come up with is they are trying to save some money on their printing bill by dropping that last 5 on TR55. They are the same plug as near as I can tell. I like platinum plugs and run TR5GP's in both of my trucks.


The stock AC Delco plugs are good to the 100,000 mile range. I believe they are iridium. That being said there are a ton of 88-95's that came with a copper type stock plug and went well over 100,000 miles before changing them.