When I was searching for new plugs last year I looked at iridium. There's different plugs for racing applications, long life, and short life. It depends on the size of the electrode. The .7mm electrode is the one that lasts for 120,000 miles, the .4mm needs to be replaced every 30,000 miles. Last year there was no .7mm electrode Denso iridium plug available for a VX, only the .4mm short life. Maybe that has changed now. The Denso Iridium #IK16 has a .4mm electrode. The Denso or NGK platinums will last another 100,000 miles. Although plugs probably should not be left in there untouched that long.
The Denso platinum plug for our VX is now #PK16PR-11, Denso stock #3275.
Never buy plugs on eBay or anywhere without seeing the part #. Is that buy now price of $16.95 for one plug plus shipping? They're only about $10 or less each at any parts store with no shipping.
Mark
Reply With Quote