kip Foss
You have to remember, platinum plugs were invented for one purpose only.......longevity.
When vehicle mfgr's started out-doing each other with " extended service intervals ", i.e. 100 k miles between plug changes, ha, ha, ha,.
The reason for platinum, if your going to pay a mechanic $ 100.00 to change a set of plugs,( because on some vehicles they are virtually in-accessible ) and then ***** about the labour, his answer will be " yeah, but you only change them every five years".
Personally, I think anybody that runs plugs 5 years and 100 k miles should be shot & peed on, and not necessarily in that order.
