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I am currently using NGK TR-6 plugs on my 2001 L conversion. Winter is coming and I don't want to have to swap plugs in January. What is the average life for these/any other plugs?
NGK's are cheap and therefore need to be changed more often. I think most l guys run them about 10-15K. I plan to run my Denso's for 100K. 40K+ on them so far.