If this is a duplicate thread, sorry....I did a search and didn't find this topic yet.
Are you using ngk (or another brand) iridum plugs and in what motor?
Do you notice any improvment? What kind of improvement (economy/power/longevity)?
Do you feel they are worth the extra money?
Dog
Are you using ngk (or another brand) iridum plugs and in what motor?
Do you notice any improvment? What kind of improvement (economy/power/longevity)?
Do you feel they are worth the extra money?
Dog